What Is Double Clutching? Don't Granny Shift!

[@volvo09]

The amount of gear shifting in that movie during a drag race was hilarious 😂

[@cyruslever586]

If theyr running 4 wide and shifting through 5-6 gears that is like 20 shifts, if theybshow every time someone shifts. Which woukd have been cooler.

[@slevpy]

Yea I find it funny he was making a joke about them “not double clutching” in a straight line race.

[@ganymede3141]

All the way up to 19th gear! 😂

[@ralanham76]

They shifted 22 times just to get to 20 mph

[@cyruslever586]

@ralanham76 I'm pretty sure it was supposed to be showing everytime someone changed gears, not 1 car shifting 20 times. They just didn't do it good. They should have showed them running next to other reving up and then show them all shifting in order or who shifts first, click,click,click,click and then revving back up. The more unrealistic part is how long they rev the rpms up before shifting, in a fast car 1-2, 2-3, and 3-4 shifts all happen in likeless than 2-2.5 seconds. My 750hp mr2 hits 100mph in less than 3-4 seconds. And wheel spin, especially in street racing is a major factor even good drivers spin quite frequently in high hp cars on non prepped public type streets on street tires and if your shits actually fast it more about who can hook and who can pedal it when they spin without losing time. Not about who hits nitrous last. Drag racing from a dig is all about the hole shot, the launch amd who can get to 3rd gear fastest

[@edeasley144]

One tip that will definitely help you when shifting in a street race is that every fourth gear you get a leap-gear.

[@daniellima4391]

Underrated lol

[@milhousevanhoutan9235]

Unless that gear is divisible by 100, then you do not get a leap gear. However if that gear is divisible by 400 you do get a leap gear.

[@dazenguile4215]

@@milhousevanhoutan9235all jokes aside, is that true about leap year? multiples of 100 are exempt from leap year?

[@redvic83]

​@@dazenguile4215 yeah but if it's also divisible by 400 it's a leap year

[@pseudotasuki]

So… go directly from 3rd to 5th?

[@bradleymaidens2285]

As a truck driver double clutching works very well because trucks are non synchronized however if you can match rpms you can do what's called floating or not clutching between gears

[@davidtaylor4053]

Yes

[@stuntvist]

Unless you're in Europe in which case trucks have been synchronized for a good 50 years at least.

[@GewelReal]

​@@stuntvistUS as always is way behind

[@bradleymaidens2285]

@@stuntvist you guys also only have 6 gears where as we can have up to 18

[@kuilios]

@@bradleymaidens2285 no we have up to 16 hears

[@ursa_margo]

I've driven a 1986 UAZ bus for a while, it did not have synchonizers on 1st and 2nd gears, and it did not really require double clutching, once you get the habit of which RPM to switch at. You just shift the stick very gently, with the tips of your two fingers, and it slides right in. It's a relatively fast process. This skill surely helped me come back home a couple of times when my clutch drive failed and I had to drive with my clutch constantly engaged.

[@TwisterWizzleNineThousand]

That sounds bloody awful! 😂

[@joeleonard9965]

Basically floating gears. Just have to get the rpm and speed matched and it goes right in

[@popupdestroyer]

Did that practice with my Renault Twingo 1994 and Audi 80 of 1990 sometimes to be prepared. It's not as hard as it sounds to train that. Justvtry it 😊

[@brianneeson685]

An old van my dad had years ago only had 4 gears and one time I was out in it the gear linkage broke so I only had 1st ans 3rd if you time it right you don't need the clutch at all! Lift the revs and push gently on the gear and when the revs drop to the matching speed it drops in gently!

[@switchtr3]

I had a cheap eclipse years back (not because F&F made me think it was cool, my Chevy K10 broke down and it was the only thing I could buy same day for a few hundred bucks). Someone beat that poor thing so hard before I got it so the synchros for 3rd and 4th gear were blown. When I first bought the car I would grind it a lot, but after a while I learned how to just shift at the right RPM and right throttle input, at that point didn't even have to use the clutch, just did it all by feel. If you know what you're driving and take your time it's all fine

[@Ratgibbon]

Of course grandma was right all along, she is F A M I L Y.

[@danieldimitri6133]

This comment is Definitely on point.

[@luckyPiston]

Did granny know that if the syncros are wearing out that D clutching up can save the main gears till rebuild time ? idts

[@christophern762]

​@@luckyPistongave granny some motor oil she didn't like it instead we fried some marshmallows and tuna

[@tiagoferreira086]

Not Family... "Fambly" 😂

[@magnawaves]

Lmao damn so Dom was right and wrong?

[@JDHarsh]

I’m a truck driver and know about double clutching, but not much about racing. I watched f&f a few years ago and that line surprised me, because the cars they were using wouldn’t normally require double clutching.

[@georgevigil7001]

I was so confused when they said Double-Clutching! At least you knew what they were talking about LoL

[@Chester-y1y]

This was especially true on some of my older Jeeps, T18 4-speed dump truck transmission, T90 with no synchros for first, etc.

[@Blade_of_Violet_Chaos]

I'm sure it would only be useful for something with straight cut gears, but even then... who uses a clutch on straight cuts?

[@JDHarsh]

@@Blade_of_Violet_Chaos double clutching is usually used in transmissions without synchros to line up the gears. Almost all manual cars made in the last 40 years have synchromesh transmissions. Certainly anything they drove in f&f had a synchromesh transmission. I think most big trucks have straight cut gears but the manufacturers say they still require double clutching so guys still shift that way.

[@greydazeplays]

Idk why they say it cuz Granny shifting is faster than double clutching if anything Dom should of said something about no lift shifting or quick shitting

[@CS-pl8fc]

Always double clutch when going into 19th.

[@gabehorn69420]

Maybe even triple clutch just to be safe

[@lealandyoung]

agreed, no way to fit a synchro after 18th gear!

[@JohnJohn-bq5ow]

Absolutely necessary to get that pink slip W... everybody knows the rules

[@nothingsurprisesmeanymore]

My Eaton Twin split only had 12 forward and 3 reverse gears but you only used the clutch to start and stop. All the gears in motion you just matched the gears with the revs.

[@MuscleCarLover]

​@@gabehorn69420Nah, that's only when you move both sticks in the same shift

[@joeyvillalobos5986]

Thank you, I needed this. I've heard Dom in the back of my head for 20+ years telling me how slow I'm shifting

[@HeinzGuderian_]

Drove professionally for several years. Never double clutched in my life. Feel the right time and shift...no noise, no grind.

[@JimmyMatis-h9y]

lol lucky you! I drove an old Honda prelude with worn synchronizers double shifted all the time until I found the shift points where the engine and tires ends of the transmission were matched 😋

[@flyboymike111357]

Some small companies will even encourage floating for experienced drivers.

[@jenkathefridge3933]

@@JimmyMatis-h9y I think you should get new synchronisers

[@MarcBchannel]

Pro drivers don't use the clutch going down the road between gear changes but here where I live you will fail a CDL test if you don't double clutch. You can shift almost any transmission with out the clutch if your close to the right rpm for the gear

[@psuperpsychophreak]

Floating is Faster unless you have syncros. Floating with syncros will give you a Furious transmission rebuild bill.

[@kkoyyyy484]

The gear shifts in F&F actually represent how many movies they're going to make on the franchise.

[@Xl3eh]

Ayoooo 😂😂

[@ralanham76]

OMG only 13 more to go. I guess they have gear shifting on walkers

[@matthewlynch5645]

Errrrr it's double DE clutching

[@jakilafaele4019]

Yussss what i came to say 😂​@@matthewlynch5645

[@madtabby66]

We’re doomed.

[@brandonmelton4108]

Guy: "Why do you guys shift so much?" Toretto: "Family"

[@yacobshelelshaddai4543]

😂😂😂

[@klikitzsmith8416]

Played a drinking game with my mate. 1 Shot of vodka every time the word family came out. I like vodka so i was fine but he had 10 lined up waiting for him. I think it was X, dunno cause I was wasted.

[@NoMoney777]

Family

[@Dudeguymansir]

Family

[@mikepurmessur420]

But granny doesn't double clutch and she's family too 😢

[@charleshof6394]

One of my first cars was a Ford Model A. I learned to down shift on it, and it became something of a game to do it as smoothly as possible.

[@firethreads]

It's not about winning races, it's about family.

[@Yaboycrab]

😂😂😂

[@juanibarra4123]

🤣🤣🤣

[@Shawnikan]

😂😂😂

[@loveplane737]

yeah that's true.

[@firstclass3736]

😂😂😂😂

[@brentfromsomewhere]

The best is when you're tached out at 9000 rpms, and then downshift from 19th to 11th to blow by the car next to you!

[@rogermccaslin5963]

You need to lift the front end off the ground for a little extra zoom so don't forget to hit the spray right after shifting into 11th.

[@doug3512]

You gotta hit that NOS switch!!

[@TheMachiniste]

Or blow your motor😂

[@pookie9461]

You maniac! You'll blow the welds your intake!!! ​@@TheMachiniste

[@alexanderlarsson1459]

Don't forget to say "too soon junior" or you won't pass and you'll nuke the manifold 😉

[@KaylieRayne]

As a trucker, that was probably the easiest to understand how to Double clutch I've seen. Everyone wants to make double clutching out to be some epic mystery. Without a Sync you just float them anyways. Clutch is for stopping and starting

[@ajg2040]

You mean you ain't got one those nifty 12 spd automatics??? 😂

[@KaylieRayne]

@@ajg2040 I actually use an auto now days due to my knee being shot from 20+ years of using a clutch. One day I went to step on the clutch and yelled in pain, what cartridge was left popped. An auto is the only way I can still drive. They are really not that bad once you get use to them, more so in traffic. I use to make fun of them too, but now they are a life saver.

[@carsonsutherland604]

Learned to double clutch when I first learned to drive. Never used it since except for some heavyweight permit loads that put a lot of gear stress on the transmission. Otherwise yeah, clutch is for starting and stopping. While I like auto transmission for flatland highway running, I still prefer a manual for mountains and off-road. Also some liquid tankers are going back to manual transmission because the liquid loads are ripping the guts out of automatic transmissions.

[@davespanksalot8413]

I’m too broke to get new synchros in my rather old 4wd. So far, double clutching has saved me from having to do them for the last eight years 🤣

[@rollovaughan]

@@KaylieRaynesame.

[@dshe8637]

I'm a granny and I approve of this video. Just match your revs and shift up smoothly. You don't need to go through all the gears if accelerating quickly, you just have to know which gear suits your engine speed at that moment. Probably don't jump from 2nd to 19th tho' 😂

[@michaelross3241]

Answered a question we've all had for 23 years. Bless you sir

[@scivirus3563]

he is right and wrong

[@voornaam3191]

This is weird. When you need to drive an old truck, you learn to double clutch. Not much choice. Why wait 23 years? That is weird. You learn it or not, there is no in between.

[@drrnvns]

All? Speak for yourself pal

[@peterga3658]

heyyyy look at that the FIRST correct coment i saw lol nice to see you @@scivirus3563

[@KarlBoss-lq6me]

Not all of us.

[@colincampbell3837]

I remember that first drag race in Fast and the Furious. I remember I did some math using an average speed of 110 mph and the time of the whole drag race, and I found that the road that they were racing on was something like fifteen miles. It's hilarious.

[@colincampbell3837]

@@PREDATEURLT 💀

[@invinsible1987]

I don't remember wich movie it was but the airplane scene at the end. They're driving like full speed for 30min.

[@pedronavaja223s]

My favorite scene was when the rocc connected the chain from the helicopter

[@colincampbell3837]

@@pedronavaja223s do you remember the scene where the rock broke his arm somehow, then later in the hospital he flexed his arm and the cast popped off?

[@pedronavaja223s]

@@colincampbell3837 Lmaoo Hollywood in a nutshell, they love to over exaggerate things nothing new. the best one was the first one after that it went down hill

[@TomsLife9]

I'm glad a few truckers chimed in, as big rigs and similar generally don't have syncrhomesh transmissions. My dad drove an oil truck back in the day and double clutching was standard procedure

[@wolfie54321]

A lot of racing transmissions don't have synchros either, because synchros get destroyed with a lot of hard and fast shifting. So it's no inconceivable that someone with a heavily modified car would have a gearbox without synchros (a "dogbox"). Even in cars with synchromesh gearboxes, some nerds will argue double clutching puts less stress on the synchros when changing gears fast and hard. BUT, in F&F they were talking about double clutching on upshifts, you don't double clutch on an upshift even with a dogbox. So it's not actually the fact cars have synchros that makes it nonsensical, rather it's because they're talking about doing it on upshifts.

[@michaelbuckers]

@@wolfie54321 Dogbox shifting is usually done without using clutch at all, you just lift the throttle and slam the shifter with full force.

[@wolfie54321]

@@michaelbuckers On upshifts, particularly aggressive ones, yeah, slam it into gear, that's why people use dog boxes on race cars, can shift faster without damaging the synchros, which is part of the reason the F&F quote makes no sense. On downshifts, you can't just slam it into the next gear without at least blipping the throttle but it's also highly recommended that you clutch to avoid putting the entire weight of the car on the impact of the gearbox. If driving gently, double clutching is usually recommended. Bikes also tend to have dog boxes, but the rules about how to operate them vary slightly from cars because they weigh nothing they can get away with slamming it more, in cars and trucks with dog boxes, a bit more caution is required.

[@Groza_Dallocort]

In USA perhaps, in Sweden it have been standard for ages even my dads tractor from 1988 have a synchronised gearbox. On another note in Sweden any new big rig have been equipped with an automatic gearbox for the past 10 years

[@michaelbuckers]

@@wolfie54321 There are no synchros on a dox box transmission. That's kinda the whole gimmick. Instead of tightly meshing teeth which allow for smooth shifting, there's a small amount of dog collar pegs that interlock very loosely which allows for slam shifting. The thing is, since the pegs are so large, you're not actually allowed to rev-match on a dog box because if the shafts are rev-matched and the pegs directly oppose each other, you won't be able to shift at all.

[@gustavusviadolphus8377]

Took my drivers licence on a Hanomag D28 from 1963. That truck did not have a synchronized gearbox so you'd have to double clutch shifting up and double clutch and rev the engine in between to shift back. After these lessons you are able to drive any vehicle even if the clutch does not work. Shifting up - wait for the moment with a little pressure on the gear lever. Shifting down - pull the gear, rev the engine - gently press in the lower gear. Without practice the gearbox protests - the more you try the smooter it gets. It works - no lie. I admit stopping is a problem. You'd have to use the starter with the gearbox in gear. It jumps a bit but in an emergancy it works.

[@robertturley2974]

Got thrown on a manual dump truck at work, we borrowed it from a different department, ours were all automatic. They all said the clutch was shot and it wouldnt shift right. 5 minutes on google taught me how to double clutch and not to put the clutch to the floor when shifting and it soon became the favorite truck to drive.

[@mromatic17]

you still need to put the clutch in for stopping and starting even if you're floating gears bro. you only half clutch when shifting cuz if its moving and you put the clutch to the floor it stops all the gears from moving and if you're rolling in gear there goes a 30k tranny!

[@jeffjefferson8137]

i want an old dump truck so bad

[@kaufmanat1]

I remember trying to learn to drive trucks at 18, we'd clutch to get out of gear, then release the clutch, and then just press the stick into the next gear and let it litghtly grind until the speeds synchronized and it would slip into gear without touching the clutch. I wasn't very good at it. My dad told me just to do the full fledged double clutch, which was clunky, but better for the truck.

[@johnmcwick1]

You could just float the gears as well. I had to drive an old manual truck to get my license to drive an automatic lol. The whole time we just did gear floating, much easier and enjoyable.

[@johnmcwick1]

@@kaufmanat1if you do it gently, you won’t grind the gears, my driving instructor taught us to drive with “Finesse” and only use 3 fingers to put it into gear. If you know the truck you won’t grind the gears. If you force it or shift too early, it will start to grind.

[@RandomlnternetGuy]

Save your synchros, wear your throw bearing

[@ImJMan007]

To me, changing the throw bearing is a much easier fix.

[@patemathic]

once the synchros are worn out just double clutch? ​@@ImJMan007

[@R03333]

​@@ImJMan007 You won't wear your synchros any measurable amount in normal driving.

[@christopherbarber288]

@@ImJMan007 You want to do a clutch job more often and pay/lose time/labor over a transmission you can probably get for

[@ImJMan007]

@@R03333 well it scares me because the dudes who had my Cadillac ATS managed to wear them out at 70k miles

[@SlickRickTPB]

as a truck driver i enjoy floating gears, its a very comforting feeling

[@NarwahlGaming]

_"This is the way."_

[@kenbrown2808]

the clutch is just there for starting.

[@festersmith8352]

I remember how I sucked at it when I first started out. Then just as you get the hang of it you end up in a different truck. Took a few different trucks to comfortably do it in any one of them. All of my experience was older CAT's, Detroit's. Then after 7 years, I end up in a brand new ISX KW. Look like I came right out of driving school again. You can explain the theory/operation till you're blue in face, but until you practice it, its just not that simple. Its definitely worth learning.

[@pseudotasuki]

You prefer it over the… *syncing* feeling?

[@philipgriessel5315]

You don't learn how to float gears, you just start doing it...

[@LM-oh3vw]

Ironically my grandma double-clutched while driving her car back in the 70’s because her car was a Fiat 500, which didn’t have synchronisers

[@xpndblhero5170]

I don't know how many times I've had to explain that to people but what gets me the most is when they ask "how does that make you go faster" and it's aggravating to have to explain that it's only for downshifting and it does not come into play when drag racing like they was in the original Fast And Furious scene.... It's mainly used in time trial racing or track racing to keep the engine revs high and to keep your transmission from trying to eat itself.

[@kendallsmith1458]

Yeah those cannibal tannies are the worst!

[@thegreat9481]

Yea thats cool and all but YOU owe me a 10 second car.

[@dk7541]

Thank you lol

[@xpndblhero5170]

@@thegreat9481 - 😅 You'd probably have to tow it to get it in the 10s...

[@Dynamicdrifting]

Mmmm... metal gears...

[@CatsMeowPaw]

Remember, when you're in a race and going as fast as possible, it's ALWAYS possible to change into a higher gear and win the race... but only when the camera is on you.

[@sjaakcornelis9960]

Would make more sense to downshift to win the race at the end

[@da4127]

I think they downshift, going into a higher gear would make the car slower when accelerating

[@MadScientist267]

Yep no such thing as a money shift in a movie unless they need a blown engine specifically for a plot 🤣

[@Hazed64]

​@@da4127 Maybe if your on a bicycle uphill 😂 that's not how gears work

[@lucythecat3416]

Don't forget the big bottle of NO2!!!!!

[@thecrazyhatman]

lol I remember asking my dad (who used to race) about this when I first saw the movie, and his response was "I have no idea what they're talking about" 😂

[@Phil_Theekrit]

Many tractor trailers required double clutching when shifting unless you float your gears and don’t use the clutch at all which most drivers do but if you decide to use the clutch to shift then you’ll need to double clutch when doing so.

[@REDxFROG]

If he doesn't know this he doesn't know how gearboxes look internally

[@69ingpandas76529]

@@REDxFROG I don't think many people do

[@MrSeedi76]

My dad would have known. He used to drive a car with an unsynchronized gear box in his youth were you had to double clutch on almost every shift. Unless you were lucky and the revs matched up.

[@dustinisaac5132]

​@@MrSeedi76I just learned to shift at the right rpms and do it quick. I always thought double clutching was just for semis but after that movie came out I was really wondering if it was something else. Turns out it was all bs though.

[@JohnnoWaldmann]

Some manuals that used to have syncro can be shifted by simply listening for the timing of the through movement. Some trucks without syncro can be shifted the same way. You just need to have excellent feel and good ears. But trucks with syncro and dual range boxes can be shifted so fast you actually have to consciously pause at the right moment to do so flawlessly. Or you can piss about. Shifting like granny, by which time you likely have to shift again if you’re going up a steep hill. So shift fast with the micro-pause, and maintain optimal revs. This can be almost as easy as sitting in a car with an automatic gearbox. The guys I worked with couldn’t believe the way I shifted on the steep winding narrow roads we worked on. But I learned to lutchless race shift motorcycles in between the rev limiter pulses at 13667rpm, and only used the clutch during downshifts between 2nd and 1st. And unlike trucks that will simply destroy the drivetrain if you get it wrong, a motorcycle at 240 will bite you so very hard, you learn fast.

[@Yanderrrr]

“shifting all the way to nineteenth gear“ killed me😭😭😭💀

[@clivewilliams3661]

Try driving a Unimog.

[@roadspectre7655]

Don't think it was 19 only. More like 29

[@ghostrecon8313]

Drive the truck with 40 sumthing gears😂

[@SightHandicappedRider9400]

Were going back to the future with this one lads! 🔥🔥🔥💥

[@greycat3373]

You crying? Why? And what does the skull emoji do to all of you zoomer?

[@beneque79]

Finally someone who mentions the shifting in F&F... the way I see it 1/4 mile was 4 ½ minutes @167 mph in 97th gear.

[@Turnheadcough]

With a blown manifold

[@ozziev3966]

😂😂

[@vincedibona4687]

What about the 30-mile long runway that airport has where the FF crew can chase down a jetliner? 🤣😂🤣

[@antoniohagopian213]

​@@vincedibona4687the plane never takes off, it never runs out of space, only when it crashes does it stop. And they just keep on going faster.

[@BadAssJeff]

Right? They must have been running half to full mile races for them to race that long and shift so far in between. In a 1/4 mile race you would probably be in your top gear in like 10 seconds. You would be shifting every 2 seconds.

[@peterelvery]

As a former rally driver, I've only heard it called double DEclutching. (Somewhere, probably in the US, the self-explanatory part of the phrase got dropped.) Very useful when simultaneously braking & downshifting in a car without traction control, to stop one or more of the driving wheels breaking traction when the lower gear is engaged.

[@luna.a.a]

I’m somewhat new to driving a manual and found the terminology used to not make technical sense. For context, I’m in the US, so I’m not sure how different terminology might be compared to elsewhere. But I thought it was confusing because people will say to “release the clutch” meaning “let your foot off the clutch pedal” which I found confusing because that action is actually engaging the clutch (right?) and not releasing it. What you’re releasing is your foot off of the clutch PEDAL (…right???), so my thought was “okay why not be technically accurate and say ‘release the clutch PEDAL?’” “Releasing” the clutch happens when you push the clutch pedal, right? So when my brother was teaching me and he’d say “release the clutch” while my foot was on the pedal I was like “wait what do you mean, if I’m pushing the pedal then the clutch is released..??” De-clutching makes way more sense to me. My guess is that “clutch pedal” is too much of a mouthful for folks

[@oneninerniner3427]

​@@luna.a.a yup, you are correct! And it is confusing, but you got it 👍

[@CobroxYT]

You don't need to double clutch to prevent the wheels from locking up. You can just rev match it with the clutch in. Double clutching is purely for getting it in gear without synchros or fucked up synchros

[@shortfattoad7317]

@@CobroxYT I shift without the clutch, just to practice rev matching. Then I discovered automatics and thought, "enough bs, I'm in".

[@m0skit0]

@@shortfattoad7317 "I shift without the clutch". Clutch disk: am I a joke to you?

[@erty2389]

Its not about synchros. Its about getting a much smoother gear change so you dont get a jerk in the driveline that could upset the car at the limit.

[@ricequackers]

Double clutching is a useful skill to have if your synchros are fubared and you need to get home, or if you want to drive an old tractor.

[@Rhaspun]

I wonder what caused the synchros to go bad. I've had quite a few cars with manuals over the years and I've never had a problem with a manual transmission.

[@brentlanyon4654]

also useful if you own a Subaru with a stick shift.

[@fchanMSI]

I had that go my 1979 Honda Accord a few years back which I used that car a commuter so it won’t be stolen. The first & second synchro were wearing out so I needed to double clutch to get into 1st.

[@christopherbarber288]

@@Rhaspun bad transmission design/bad owner practices (bad shifting, bad fluid, etc.)

[@peterjohnson9438]

I don't know about the rest of you, but once I learned to double clutch my downshifts I kept doing it because it not only made rev matching easier, but also makes the gears go in with little to no resistance. Plus I drive a 20 year old car with 180k miles on the clock.

[@Aloooy108]

Double clutching is mostly used when drive manual semi-trucks.

[@kingdomkey2011]

Only learned double clutching for the DMV test and I been floating gears ever since.

[@jaredlancaster4137]

Depends on the driver, most don't double clutch. Also, most people don't know this, but you can totally single clutch an unsynchronized transmission

[@JoshuaTootell]

Never once saw my father double clutch his truck in the 80's and 90's. Clutch was only ever used for starting and stopping the truck.

[@jaredlancaster4137]

@@JoshuaTootell good skill to have though, sometimes a good way to recover from a missed shift. If you're a boss and never miss a shift then you don't need it

[@m0skit0]

@@JoshuaTootell Some weird American automatic gearbox?

[@lunaticgamer75]

Fast and Furious where drivers change more gears in 15 seconds than a Formula 1 driver in an entire lap

[@kenbrown2808]

Where they shift more gears in an eighth mile than a heavy haul trucker

[@bboymonk3y]

They have to slow down to shift up again that's why..

[@ricardokennedy9320]

I thought it cause they drift a lot agile speeding

[@GT86S]

And fun fact for you also, on average, Formula One drivers make around 80 gear shifts every single lap!

[@cefb8923]

You havent watched a lot of F1, they're downshifting like 5 times for a turn then ripping right back within a few seconds.

[@mannys9130]

It's useful for downshifting only, and it's most useful for "fooling" the synchros when you're attempting to downshift past the next lowest gear. Sometimes synchros are a bit overprotective when downshifting. I can't shift into 1st gear at anything over 5mph. If I double clutch however, I can speed up the input shaft/countershaft a lot more and that more closely matches them to the output shaft's speed. The synchro blocker ring pivots to block the dog teeth until the shaft speeds are matched and they will stay in the blocking position whenever the difference in speed is too high (such as trying to shift into 2nd gear at 75mph). If you double clutch and rev up the input shaft before making the downshift, the synchros are able to match the shafts and the blocker rings will not prevent the shift. I can then shift into 1st at 10mph when I know I need to slow way down to take a turn into a parking lot. If I didn't do that, I would need to slow way down and then downshift while in the turn or after it. You don't want to take a turn with no power applied to the wheels.

[@tadecker82]

For ANYONE who has ever driven a manual, look up "twin stick 18 speed". I learned to drive manual in a 1976 Mack dump truck, with one of these. By the time I got into my first "modern" 18-wheeler (10-gear Eaton-Fuller), I was "floating" without ever having to touch the cluch while gearing up (aside from when at a dead stop). It was REALLY fun when a friend of mine let me drive his bored-out '99 Trans-Am on a drag strip. Not only did I beat the heavily modded Mustang next to me, but my run was the smoothest the race coordinator had ever seen in his 40 years of working drag races. 😂

[@1738-l1j]

Its embarrassing to like in such an old age

[@marshallmatters1526]

​@@1738-l1j Why's it embarrassing?

[@se7ense7ens37]

@@1738-l1jthat doesn’t even make sense bro

[@rexjolles]

my car has an unsynchro 1st gear, so downshifting from 2nd to first requires double clutching, and even if you're at a stoplight in neutral you have to double clutch it back into first (or reverse)

[@briangwynn3592]

​@@rexjolles That sounds more like the linkage for first is bent. If 1-2 synchro is bad, you'd have to double clutch or rev match going up.

[@stevenkaskus6173]

I've only driven standard transmission cars since I started driving with a license (and before) for almost 50 yrs now, I'm so happy they have synchromesh gears.

[@georgevigil7001]

Is that part of the gear itself or is it a separate system/piece?

[@ffffffff-vv7yp]

@@georgevigil7001 Such a very complicated question needs an easy answer. Synchronization is a part(numerous parts) of the gearbox. It's not part of the actual gears that transmit rotary motion and modify rotational speed and torque. The synchromesh gearbox is a continuous mesh gearbox with added synchronization pieces. Neither(unlike the super oldschool gearboxes) move the actual gears when shifting, instead fully connecting them to rotating axles one pair at a time, by means of moving other smaller bits and pieces. All the gears rotate at all times when the vehicle is in motion.

[@georgevigil7001]

@@ffffffff-vv7yp that is bad ass! I don’t think I 100% fully understand it but your answer gave me a solid idea. So fascinating! Now I’m wondering, what happens if that breaks and how much will it cost 😆 I have a manual and by operating it, I would never have thought there’s that much involved in every gear change. Who would’ve thought! Thanks for the detailed (and simplified) answer brother!

[@ffffffff-vv7yp]

@@georgevigil7001 There are videos and animations on the function of synchro gearboxes on KZbin, maybe that's more understandable. You would see a fork thingy moving a collar thingy along one of the axles from a splined piece to another. The bigger gears are the actual "gears" and they keep rotating and paired at all times, and that's the continuous mesh part of the deal. The smallest yellowish pieces are the syncro rings, and that's what makes it "synchromesh" as in not requiring special techniques to drive. In case of the synchro rings wearing out, it would either need to be tolerated, replaced or repaired. The latter done properly would involve removing the gearbox from the vehicle, tearing it apart, replacing some minor parts (preferably more than the actual broken ones) and assembling everything again. This is obviously horribly expensive when done by a professional by the hour, and in worst case the gearbox could be beyond repair anyway. Or, alternatively and typically for a high mileage car, a used junkyard transmission is transplanted without bothering disassembly of the original, and even that could still be kinda expensive especially if not DIY.

[@moonshinershonor202]

@@stevenkaskus6173 Frfr

[@iamspencerx]

When I was a kid there were old trucks from the 40s or 50s still in circulation and my father told me to listen carefully when they drove past because you can hear the double clutch. I used to double clutch for fun when I had just gotten my driver's licence, although it wasn't necessary

[@Phil_Theekrit]

The Eaton fuller 11/15spred transmissions in most of the rigs all the way through the 2000’s require double clutching to shift when using the clutch but the synchronizers make it possible to float your gears and not use the clutch at all when shifting . Only to start and stop is when I use it. I was taught to double clutch back in early 90’s when I got my CDL.

[@topsunnn]

Wait you only clutch when you stop and start? 😂​@Phil_Theekrit

[@onradioactivewaves]

​@@topsunnn that's how I'd drive as well when I had a manual. You wouldn't do it for racing, but if you know what you're doing the clutch doesn't even make a difference. ( You don't just have to rev/speed match but also be revving up/down when shifting in/out of gear).

[@topsunnn]

@@onradioactivewaves explain revving down for me please. How do you do that

[@topsunnn]

@@onradioactivewaves also, why would you ever want to be changing gears by rev matching with a perfectly good clutch just so you don't use that clutch. This makes absolutely no sense to me. Thats some mental illness stuff

[@INSERTNAMExHERE]

I did this in my old 3rd gen camaros. Made shifting muuuuccchhh smoother! I knew then so well, i could upshift and downshift without the clutch at times. I miss having a manual sooo much 😪

[@Wild_Bill57]

Had a chance to drive a 1929 Model A (edited, not a T) just before it ended up in a museum. It was my brother’s and he was quite surprised that I knew how to double clutch. It’s actually not hard to do if you’re not racing. The scary part was the mechanical brakes, no hydraulic brakes in those days, amazing how much force it takes to use and how poorly they function.

[@kendallsmith1458]

And ppl today freak when using drum brakes!

[@KB10GL]

Sorry to be pedantic, but model 'T' production ended in mid 1927. Ford did not have any cars to sell till late November 1927, & this was the first of the Model 'A'. The car you describe was a 1929 Ford Model 'A'

[@bolson42]

lol double clutching is always easier than regular shifting, it just takes more time and slows you down. Idk where anyone got the idea that it’s some difficult technique to make you faster. Blipping to downshift is so much faster since you don’t have to clutch in/out in neutral, and requires a bit more skill to rev match correctly in a car with a sportier clutch.

[@UpToSpeedOnJaguar]

Mechanical brakes aren't all bad. My old beetle has fully Mechanical brakes. What those brakes are made of and how much coverage they have is a big factor too.

[@Wild_Bill57]

@@KB10GL of course, you are correct. As soon as I read your comment, I realized that I had a brain fart at time of posting. It was still an amazing experience and the carefully timed process my brother had to go through to get it started was impressive. The first time he tried to get it started for me, he flooded the carburetor because his explaining the process to me screwed up his timing. Today, it would be nearly impossible to steal.😀

[@smallpp6986]

Grandma was a racing legend, you should listen to her 👵

[@LJHibt710]

Ain't nobody meaner than the little old lady from Pasadena. Terror of Colorado Bulavard. Go granny go!

[@outkast937]

In my case she was 😂 seen her drift on a back road haulin a 30 foot gooseneck (wasn't on purpose, truck in front of us slammed on the brakes and dumped a bunch of chicken guts on the road, shits slick as hell, trailer kicked out on her and she just answered with the sickest drift ive seen in my life)

[@MrCalverino]

😹😹😹😹

[@niko7903]

Grandma knows best. She's never wrong. Even when she is wrong, - think again, - grandma's never wrong! Just ask grandpa.😉

[@LJHibt710]

Grandma WAS the little old lady from Pasadena with pretty flowerbed of gardenias and rickety garage with shiny new super stock Dodge.

[@Mr.JimPickens]

When Vin Diesel drives he doesn't shift. He just place his hand on the shifter and the gearbox shifts for him.

[@TheGoddamnBacon]

He's like the Mr. Popo of drag racing: "It just knows better." XD

[@JayRSwan]

Soooooo he drives an automatic; I mean, technically, they are better for racing.

[@nielsonderbeke8507]

I would have liked your comment, but you have 69 likes, and it feels like I shouldn't be touching that button

[@m0skit0]

@@JayRSwan Rally cars staring: define "racing".

[@JayRSwan]

@@m0skit0 lol good point, I was talking about drag racing from the movies.

[@bryancenterfitt7127]

I've tried to explain this to people for a long time...finally..someone else explains it the exact same way I have for a long time!

[@klausstock8020]

Fun fact: a Unimog 406 with the "big gearbox" option has 20 usable gears (not counting reverse). To shift from "18th" (5) into '19th" (L6), you need to operate two of the six gearsticks at the same time. Also no synchro-mesh - but an experienced driver *can* shift without double-clutching.

[@baconthevainglorious7371]

Sorry what? Do I gotta become a Hindu 6-armed god to operate that beast? What do you mean use two gear shifters at once while shifting into the highest speed gear?

[@LesserAndrew]

The Unimog is a beast

[@ke6gwf]

​@@baconthevainglorious7371you have to take your hands off the steering wheel and use both hands lol You have a high/low gear box, a 4 speed gear box, and a 2 speed read axle, at least in some versions. I have friends with logging trucks in the US that have 5 shift levers, a 4 or 5 speed main transmission, and then 4 Brownie Boxes, which are basically small auxiliary transmissions that install behind the main transmission, with 4 speeds each. To go through his gears, you need several hands looking

[@flagmichael]

I learned to double-clutch in 1972; used it a lot on my Lotus Europa. and a whole lot more in my F350 work truck on packed snow mountain back roads. It's all about getting everything go shift smoothly together: engine, gearbox internals, wheels.

[@moonshinershonor202]

When it slips in like silk Chef's Kiss

[@allenmontrasio8962]

In old-school cars (when throttles were mechanical and there was no computerized rev matching), double declutching from 3rd to 2nd made for a smoother change even with synchromesh. We're also talking about old-school 5 speed gearboxes with a big rev jump from 3 to 2.

[@Name-ps9fx]

When I was in trucking school, I discovered I'm not as coordinated as I thought...the first weekend after learning about DC, I spent much time going through the motions slowly and deliberately... clutch in, neutral; clutch out, rpms up (for _downshifting_ , or down, if _upshifting_ ); clutch in, in gear; clutch out, throttle as needed. 20 years later I can still double clutch and _still_ check my mirrors taking corners. (I now drive a car, btw)

[@redbarchetta8782]

Blimp to rev match which helps on down shift, but double clutch is something you do in a car from the 1940s and below normally. Some of those older cars had square cut gears as well.

[@nyftn]

or in a semi with a fuller gearbox .

[@blairleighton3343]

Or in any tandem with twin sticks and 5 and 4 Spicers.

[@oneninerniner3427]

Well they aren't necessarily square cut. Most manual trans are constant mesh, meaning the gear teeth themselves are always in mesh. There is a splined shift collar on a hub that's solid on the main shaft that engauges the gear to the shaft when selected. That's where a synchronizer blocking ring would be. They should actually be called syncro braking rings. Those old ones just don't have syncro blocking rings. Synchronizer rings are kind of like little brakes on each gear that match the speed of the gear to the main shaft when selecting that particular gear. The only gears that aren't constant mesh (that actually mesh and unmesh) are usually reverse and super low on a truck trans.

[@thatslegit]

Thats what you call a crash box

[@AstrosElectronicsLab]

@@thatslegit or crunch box.

[@ArnCital]

I learned to drive on a 1938 Ford truck with a crash box 4 speed. No synchros. My Dad (RIP) taught me how to double clutch. My Ford '85 F-250 has a T-19 transmission and double clutching is necessary at higher RPM shifts.

[@Mikdeelow]

My first car was a ‘61 Beetle (1200cc). It was so sluggish I would shift with the gas pedal on the floor-just clutch and jam the gears. I learned to check the gas and oil, I ran out of gas twice and oil once! It blew one of the piston rod caps through the crank case! lol! What a thrasher!

[@iFixJunk]

No idea why those cars get a following.

[@kingtiger3390]

​@iFixJunk Because the dude blew his engine and could get it back on the road in three hours for a couple of bucks.

[@Mikdeelow]

@@iFixJunk I only had the one. To me they are dangerous as H. I rode as a passenger in a VW bus once, it was scary! Years ago a friend built a V6 into a VW bus! I could do wheelies in all gears! I am always haopy when I see VW beetles and buses on the road, especially those VW clubs I see around.

[@Anthonybrother]

@@iFixJunk It's because these retro volkswagens were very simple designs, easy af to repair.

[@iFixJunk]

@@Anthonybrother Yeah. But lame enough to be a hazard to EVERYONE on the highway.

[@jeremyortiz2927]

My 1st car (1950 Plymouth Special Deluxe) required double clutching using the 3-speed on the column.

[@dubhead_dena]

Thanks to this, I learned to change gears without using the clutch pedal. You just need to shift into gear at the right moment. This skill came in handy once in my life - when my clutch broke about 20 km from home and I was driving late in the evening, so I saved a few hours (waiting for a tow truck).

[@adamclark9253]

It is necessary on some big trucks, used to have a dump truck with a split shifter. Had to double clutch every gear

[@uliwehner]

only in the USA. trucks in europe had synchros from the 50s on. only when the synchros go bad do you double clutch, Unimogs often had bad synchros.

[@socaljarhead7670]

Still very common

[@JAlves88]

Doesnt every manual big rig need double clutch....guessing thats y we learned it in cld class.

[@uliwehner]

@JAlves-vk8rz only in the US. Europe has synchronized transmissions. Always did in my lifetime

[@adamclark9253]

@@uliwehner I'm a bit jealous,,, us in America are getting there, in California they took our diesel trucks away unless they are a certain year, don't matter if they don't smoke(did my smoke test yearly unlike smogging that's every 2years.) I went from gas saved up changed everything to diesel then they started this law wich almost bankrupted me, changed everything back over to gas, started the business in 92, now in 2024 I'm recovered but my government set me back years

[@williampatrickfagan7590]

Worked with mechanic who had a 1966 Ford Cortina. The car had a cyncromesh box. But he always double clutched as that was what he was thought in the 1930s.

[@greecoboost]

Today I learned that Ford actually had a car with a name that sounded like a Taco Bell menu item.

[@elfishcoder7287]

Synchromesh

[@williampatrickfagan7590]

@@elfishcoder7287 Yes big typo by me

[@Sam-ob4of]

*taught

[@pandaiam]

What I like a bout double-clutching is that you are in neutral, so if you mess up your revs. you can slap or progressive brake...or if you have time, rev again. Also, for me it taught me better timing for regular (single-clutch) rev matching.

[@VraerynDaDragon]

This video was incredibly useful to me. A friend bought an 88 Camaro with a 5 speed. While test driving it before buying he was having trouble getting it into gear while sitting still. Remembering this video, I told him to try letting the clutch go while in neutral. Did the trick! It might have synchros, I'm not sure, but that specific time everything was catching and double clutching was actually useful.

[@elsecomojado1]

It was actually the double pressed of the pedal hydraulics that built up the pressure to lift the clutch enough for the shift to go in. Either needed a new clutch, or something going on in the hydraulic system for the clutch.

[@clivewilliams3661]

That was more than likely a problem with the clutch hydraulics. By double de-clutching (the correct term) it pumped up the hydraulic actuation.

[@rltozer7086]

No you don't need to double clutch an 88. Double clutching makes zero sense.

[@clivewilliams3661]

@@rltozer7086 I would alter that statement slightly in that you ought not to need to double de-clutch an 88 because it has synchros. However if the synchros are worn out then they can't function properly and therefore double de-clutching must be used. The van I was taught in was a 1950's Bedford CA that came with a 3 speed but synchros only on 2nd and 3rd that by the time I drove it were shot. Similarly my 1962 MG Midget had a worn out synchro on 2nd gear. In both cases it would have cost more than the vehicle was worth to take the gearboxes out and fix them and there really wasn't any need for the synchros to enjoy the vehicles (assuming you knew how to double-declutch).

[@alanhat5252]

​@@rltozer7086you've just followed THREE comments ALL explaining a reason why it can be necessary!!!

[@Copper.Trees.]

Wild. I learned that as "Rev matching" in my 2001 VW Golf. At the time, I was told that "double clutch" was an old type of manual engine that required you shift into neutral to give it gas then shift into the desired gear

[@moonshinershonor202]

That's why I do it, to keep my rev matching skill ready at all times. Itol reduce wear on the synchros to, if done correctly.

[@Gunbucket1964]

It'll increase wear on your throw out bearing. 😂

[@Copper.Trees.]

@@Gunbucket1964 what's that mean? Explain it to me like I'm 5 please

[@jonathanlewis453]

There are three major components to a manual clutch. The first is a two sided disc with friction material on either side. The second is a cover plate with an internal mating surface in the form of a disc and a spring lift arrangement. The third is a ring ball race bearing. The result which the system accomplishes is to trap the disc against the engine flywheel when drive is required but when the clutch pedal is depressed, a cable or hydraulic linkage actuates the release or throw out bearing, operates the spring arrangement and releases the disc from the flywheel. The arrangement slips, which allows progressive take up. You will appreciate that this bearing reconciles a rigid release apparatus fixed to the gearbox with the rapid rotation of all of the clutch components when locked or affixed to the flywheel. The act of double de-clutching spins the clutch disc and the gearbox input so they reconcile manually with the gear which will be acting in conformity with the final drive. The short answer to your question is that the clutch pedal and release arrangement in the clutch cover, including the bearing, are being operated twice instead of once.

[@moonshinershonor202]

@@jonathanlewis453 🔫🤠 That is not toddler appropriate jargon. I thought throw out bearings were replaced with clutches for a tidy job. Aren't those cheaper than synchros? Something has to wear out 🥲, even torque converters.

[@boatoflol]

I watched Initial D when I was 17, got drivers licence and learned double clutching. Now I'm 32 and still only double clutch. It just gives me a good feeling every shift I do, the gear just falls perfectly into place. Also my car now has 407.000 Km, just recently had to change it's clutch. It was still the factory clutch... I guess it saved some of my clutch having to grind a little less every shift.

[@DmitriPisarev]

That, and also synchros in your gearbox probably also said "thank you"

[@BotulinSpikedMarzipan]

You can also dog shift, by pulling out of gear, controlling RPM and shifting in gear, no clutch needed. My dad showed me that.

[@DmitriPisarev]

@@BotulinSpikedMarzipan yeah I'm able to do that as well, basically the same thing as above, you just have to match RPMs precisely. Would obviously wear your synchros, so I would not do it daily :-) But came in useful when I had a clutch broken and had to get to the mechanic

[@BotulinSpikedMarzipan]

@@DmitriPisarev Just like dad told me, in case the clutch goes bust, kinda like it once did on our Tomos APN-4

[@DmitriPisarev]

@@BotulinSpikedMarzipan yay! Welcome to the club of people who know how to shift gears :-D It's not populous...

[@codyleonard9798]

That's really only used in straight cuts, but you can float them too. Ask any truck driver, they only use the clutch when starting, stopping or reverse. Other than that, we just float gears.

[@kendallsmith1458]

I trained a recent driving school grad. When I showed him how to float "OH that's much better!"

[@TV99DE]

I took my test in Ohio, you’re basically required to double clutch every shift. Out on the road driving, all you do is float the gears, and honestly the more weight your pulling the easier it is. Makes it hard to go back to a synchronized transmission though lol

[@BawkBawkBawk666]

​@@TV99DEI did my road test. The examiner said to show him at least one double clutch. The rest of the test I floated the gears

[@tapioca6863]

Question; I've never heard of "floating gears". How do you do it? Genuinely curious

[@messier6659]

​@@tapioca6863 you can upshift/downshift without using the clutch if you match the rev

[@Fightre_Flighte]

For anybody that missed the detail, double clutching is supposed to rev match your transmission, not just your engine.

[@Bhong666]

The most important detail is that SYNCHROMESHES exist, so unless you're driving something from the 1930's, double clutching is a waste of time!

[@rohansprenger6902]

and rev limiters - so if you're not flat changing, you care about your clutch way too much.@@Bhong666

[@Dranok1]

​@@Bhong666 This comment simply suggests you were never taught how to drive a normal manual gearbox vehicle.

[@salvadorramirez2459]

​@Dranok1 I've never heard of Granny shifting until F&F N never have I ever used this style of shifting before the movie.

[@Bhong666]

@@Dranok1 No... 🤣🤦

[@EJ-tf8uw]

The “19” on the shift knob! 😂😂😂 GENIUS!

[@proxy9573]

I think I've double clutched before. The stick shift I drive is a Suzuki Samurai, so its slowness sometimes warrants making some shortcuts to not become a road hazard.

[@roadk88]

You only needed to double clutch the old crash box trans when you actually were sliding the gear teeth together. The synchro mesh trans did away with that as the gears are always engaged, and you just engage the shift dogs, which are much more beefer than the gears themselves. You can upshift and down shift a syncro without ever touching the clutch. It also made power shifting a reality.

[@DJBRO2005]

Clutch is for going from full stop into a rolling first gear. Clutch is then quite optional. 😂

[@LesserAndrew]

That's a helpful explanation. I learned to drive on an old tractor, so I was taught the manual tricks. I drive an EV, so I've never learned what makes newer manuals different.

[@joevarga5982]

"You can upshift and down shift a syncro without ever touching the clutch." Depends on the gearbox. Didn't work on my AWD Audi S4.

[@roadk88]

@joevarga5982 There is a trick to it. You have to take it out of gear, into neutral, and then apply light pressure on it in the next gear you are shifting to. It may take a few seconds, but when the engine speed and gear speed synchronize, it will just slip into gear. If you apply too much pressure or rev the engine too high, it will cause the shift dogs to not engage, and you will get that clacking sound and stick rumble. If that happens, release the pressure immediately and use the clutch. It can round off the shift dogs, and if you round them off enough, the trans will start popping out of gear, especially under acceleration. When down shifting same as above, but while you are putting light pressure on the lower gear you need to rev the engine slowly and once again when the engine speed and gear speed synchronize, it will drop into gear. And if you are coming to a stop, applying the brake helps as it slows down the gear. Try it again. I have never seen a syncro mesh trans that could not be shifted without the clutch, yours would be the first. If you read this far, I would like to thank you. Peace out.

[@joevarga5982]

@@roadk88 I KNOW how it's done. I've done it in OTHER cars.

[@fredericksaxton3991]

I always double de-clutch my Jaguar XK120 when going down the box because it has the old Moss g/box. It always snicks in nicely, if I don't I sometimes get a grawnch. Also, when over in Normandy for a D-Day com event, I once had to drive a old Morris 5 tonner 50 miles back to our campsite because the normal driver was a tad drunk. He said the secret is change gear by going into neutral, count 9 seconds then slip into the next gear. OK, I said, I started off, from 1st into neutral, double de-clutched and instantly into the next gear and we got up speed and we drove home without any grawnching but lots of double clutching up and down the gear box. A very interesting day out that was.

[@allanmcelroy9840]

One of the few times double clutching worked

[@gsd4me00]

Thank you for using the correct term, which is...double de-clutching. :-)

[@fredericksaxton3991]

@@gsd4me00 🙂

[@doraexplora9046]

"That Moss box is slower than my Grandmothers Druel!" No noticeable synchro's in ANY gear, let alone the dog cog at first!

[@nottrademarked2957]

​@@gsd4me00not to mention grawnch, which is actually a hilariously accurate term

[@_JayRamsey_]

Damn, Bro, almost blew the welds off your intake with that one!

[@achmetdasdonermeister9570]

Sometimes I have to do it in my 1992 Mitsubishi when the synchronization doesn't work. Quick shifting can damage your synchronization, and without double clutching, the gear won't go in with higher rpm

[@braybraymaster77]

Learned how to double clutch on a Model A Ford 1929.

[@jamesslick4790]

Double clutching IS a thing in a Ford Model "A" for sure, Not needed in a Ford Mustang (unless the syncros are fried). LOL

[@braybraymaster77]

@@jamesslick4790 Well the mustang my grandfather has is an automatic, and for standard other than the Ford A, all I have/drive are tractors. And one does not double clutch a tractor.

[@Wise4HarvestTime]

​@@braybraymaster77when I learned to drive a tractor, I had to double clutch for my road test

[@braybraymaster77]

@@Wise4HarvestTime well the ones i have only have 4 gears, one road gear. So no time to even double clutch.

[@Wise4HarvestTime]

@@braybraymaster77 that makes sense. Dirt tractors 🚜 aren't quite the same as road tractors 🚛. Transmission steering and tires are a lot different

[@ooohhhsnap9241]

Grandma is the real G here

[@mirrorblue100]

Thats OG to you!

[@Mu4dD1b15]

I actually found a useful reason to double clutch in my mid 2000s saab 93. There was a little clip that kind of returned the clutch pedal back to where it was and it broke. For a period of time I found that double clutching every shift was actually the smoothest way to shift the car. Once I replaced that little yellow piece in the clutch pedal, regular shifting became smoother than double clutching, and I stopped doing it.

[@random_gay_transfem]

i wonder. cant you just shift and while still holding the clutch press the gas?

[@cupofchaffee8875]

Ayyy, fellow Saab 9-3 driver.

[@supazippy3059]

Speed shifting is best shifting. I had a 72 Ford pickup that I hated my granny box that I had to granny shift, I got it to be almost automatic fast by learning to speed shift. At a certain RPM and vehicle speed, that stick just goes from one gear to the next without a clutch press. Pop had to know this since his school bus driving consisted of driving a "square geared" 1977 Gillig which had no synchros. Which taught me to have an experience of driving it to actually like it.

[@gangster4896]

I used to study from your videos in my engineering college days. I missed you. Thanks for appearing on here again!

[@jasonmarks6]

Most important video of our generation. It doesn’t matter if you win by an inch or a mile, winning is winning

[@jonmcdonald6374]

😂😅🤣 I know right.... This is what's shaping our youth. This was the dumbest of a series ever made. I can't believe it had so many sequels. Who's still going to see this crap?🤔😂

[@mac1bc]

But I was told Monica would give me some, whether I win or lose.

[@clivewilliams3661]

And to win you have got to be there at the end.

[@DivideBYZero69]

Family

[@raverbunniaz]

I've never seen a non synchro trans and I daily drove a 60s truck for over 20 years ... My 65 Chevy C10 *had* synchros until about 400,000 miles (mid 2000s). But once those synchros went it was double clutch both ways. Saved me the one and only time that truck got stolen. Guess thieves can't double clutch 😂

[@SajtosNokedli]

Fiat 500 had async 1st gear version during its whole lifecycle (maybe not in all versions). And a few Comecon cars. Some of the Czechoslovakian trucks had fully async gearset until like the late 70s or early 80s.

[@Vivacemalt]

As a truck driver, I became pretty proficient at double clutching and power shifting(a different technique where you eliminate clutching altogether). At street racing, I have no experience.

[@SamusMaximusSMXD]

Finally someone understands the differences in transmissions and why double clutching doesnt work in a conventional passenger car manual transmission

[@kurtwagner16]

well it does totally work, its just not as usefull

[@madtownguzzi]

Double clutching does work on cars. I used to do it all the time with the old three on a tree cars.

[@raindropbebop]

It does work, it's just not strictly necessary. It definitely saves wear on your synchros, tho. Especially when downshifting, which is harder on the transmission overall unless you have very accurate revmatching (as opposed to upshifting where you just need to pull off the throttle and naturally let the RPMs drop to match).

[@TimHayward]

It also allows you to downshift faster because you use the engine to speed up the clutch, rather than using the slipping synchronizers to speed the clutch up.

[@Rapscallion2009]

It's pointless on most modern cars. I do use it when I need to use a LOT of engine braking, but that's it. Otherwise, it's slower.

[@JustinTuchek]

I think it's where you shift straight from 4th into R (turbo mode), aptly named because it shifts two spots on the knob

[@lancepate]

@@pcsullog It actually stands for ridiculous-speed. It's one faster than lightspeed but one slower than ludicrous-speed.

[@JustRememberWhoYoureWorkingFor]

In my country we say R for rally 😂

[@lancepate]

@@pcsullog "New" Spaceballs is almost twice my age, our frame of reference pertaining to time might be a little different 😂

[@dk7541]

R IS FOR RACEMODE...come on guys

[@Mika-ph6ku]

@@lancepateI call it race mode

[@thebigd6249]

Double clutching is primarily used in heavy trucks. Although many experienced drivers will not use the clutch at all and just listen to the sound of the engine and know when to shift. The throttle blip the video speaks of is especially necessary when down shifting.

[@No_Fuse8771]

22 years of driving trucks, I only float the gears, and that's for downshifting. It could be, I work in the city working drayage, that I just got use to the sound of the engine.

[@geoffmerritt]

@@No_Fuse8771 Floating gears, is that term for not using a clutch. As you take your foot off the accelerator little bit of pressure takes it out of gear and as the motor slows a little bit of pressure will get it in to the next gear. Hardly use the clutch on the 4wd

[@No_Fuse8771]

@@geoffmerritt Yeah, that's not using the clutch but for starting and stopping. I also do this in my Jeep Wrangler 2018. My new jeep has an auto 8 speed.

[@HoistTheBloodyColours]

This is the same for my 90 year old car. I can’t drive yet but I think I actually like the idea of changing into neutral each time if you are good at it.

[@001Rupes]

Double clutching is useful in synchro gearboxes when the synchros are worn. Especially when downshifting. Can avoid some nasty grinding that way.

[@alanhat5252]

or a complete refusal for the gearbox to shift!

[@paul_warner]

They still teach this in CDL schools, if you're learning manual. Also you don't press the clutch and then move the shifter, you do it at the same time. Press and shift, then release the clutch, then press and shift, then release the clutch to engage the gear. If you do it with the right rhythm you barely need to tap the throttle to engage the next gear.

[@UKKC80s]

Done right u don't even need to take foot off throttle at all. Keep it pressed down. Timing tho needs be on point..but listen to engine and you'll get it. Smoothes change ever..but does use more petrol.

[@jesustontinsalgado6366]

The right rhythm is as easy as the “Adam’s Family Song “….. clapping

[@mromatic17]

you clutch half way each time you are changing gears and you only go to the floor if you are starting or stopping .

[@cbotten106]

@@jesustontinsalgado6366 Fester is that you?

[@justalittletoserious7796]

In some parts of Italy we call this "doppietta" (the translation means "double barrel shotgun"). Essential If you have an old Fiat 500, in the oldest ones you had to do this while upshifting AND downshifting

[@sauter1]

Doppietta e punta-tacco. Old school, baby!

[@bobbrace9824]

Learned this on an old 1934 I believe it was Ford with a flathead V8 . Had to do it right or stop and start over. Still use it when downshifting on any standard tranny i drive . Why ? Just a old habit I haven't broken. But it still works for me. 😊

[@joseguzman1073]

Nah just summon a million gears while yeeting your charger off a dam

[@Andrew-ep4kw]

My father taught me double clutching even though all the cars we had featured synchronized transmissions. His reasoning was it would save wear and tear on the synchronizers, and a clutch is cheaper to replace than a transmission.

[@macdonaldkuchocha2834]

I do it as well, especially when towing a trailer, just to minimise the sudden torque hit when you engage a lower gear when slowing down, thats the thing that makes engine go haaahaaaa

[@Zach-ju5vi]

Yeah I used double clutching to make shifting smoother. It depends on how the transmission responds to how you shift

[@ruffestneckaround]

Rev match your shifts, double clutching is completely unnecessary

[@ChickenDeranged]

been driving manual for nearly 40 years now, never doubled clutched, except when smoking the odd joint, and have never ever burned out a transmission, but have replaced the odd clutch. Double clutching in a modern manual is bullcrap - but the funny thing is i do it all the time on my bikes, because its quick n easy and sounds great...ha ha

[@sven679]

Oh man. For sure I don't want to replace the synchros after 900 000 km... Rather do it at 1 200 000 km and do one extra clutch change in between.

[@wcsoblake85]

On my 08 Civic SI I bought the Hondata tuner. It has a no-lift shift option. It works great!

[@JayRSwan]

Can I assume you removed the cats?

[@DontDieSenpai]

I gotta rebuild my 07 Si transmission before I turn on no-lift shifts. Represent!

[@applepoop10]

@@JayRSwanMy K24A2 200 HP swapped Honda CR-V has the cat removed. Due to fact that it was stolen. 😅

[@JayRSwan]

@applepoop10 I was asking as the no lift shifts cut ignition. When it comes back on, they ignite the unburnt fuel now in the exhaust and give u a cool flame between shifts, but the cats don't like it.

[@cbotten106]

My 1978 Civic has a Hondamatic transmission. You had to switch from high to low range.

[@vegardwitsoe]

Exeptions worth mentioning though: *Synchromesh is the first thing to fail in an old worn manual. If you drive an old car, double decluthing is the only way to change gears. Typically between 1st and 2nd. *Old tractors aren't synchromeshed. They just aren't. Coming to a complete stop between each gear shift gets old fast, so you double declutch them. *Performance vehicles, motorbikes in particular. Your motorbike has a 6 speed, close ratio, unsynchronized sequential manual. Affectionately, a crashbox. Clutch is needed only for getting started from a complete standstill. Close gear ratios and lots of intentional free play in the drivetrain lets them be crashed into gear without clutching. Hence the name.

[@nitschke30]

Huh, I’ve been doing that in my own manual since I bought it; it makes rev matching so much easier. It’s nice to know that this is what it’s called.

[@htimsid]

But why do you do it?

[@nitschke30]

@@htimsid After rebuilding the transmission (first gear teeth were sheared when I bought it), I realized that rev matching would extend the life of the synchros. I figured that using the clutch to bring the gears up or down to the speed of the next gear in between my shifts would allow me to rev match. I now know that’s what double clutching was, but I had no clue of it at the time.

[@Tensquaremetreworkshop]

Actually called double de-clutching.

[@7x779]

How could letting the clutch out in neutral and blipping the throttle possibly help match the speed to the next gear if you're up shifting, when you need the RPM to drop to match it

[@Tensquaremetreworkshop]

@@7x779 You don't- it is normally only used when down-shifting.

[@j.robertvillarreal5926]

Granny Shifting refers to a specific transmission made by GM that was used for both passenger vehicles and medium duty trucks. Both transmissions had the same gears however the passenger vehicle variant had an aluminum case. It was referred to as Granny Shifting because 1st gear was for starting from a stop with a heavy load. With these trucks you would start your shift pattern in 2nd gear with no load. 1st gear was for towing and hauling. I know because I trained on these transmissions.

[@briangwynn3592]

That's a granny low gear. Granny shifting is double clutching on the upshift. It's a reference to the olden days before synchromesh.

[@j.robertvillarreal5926]

@@briangwynn3592 synchronizers became mainstream in the late 50's. Back then I don't think they used the clutch for shifting after first gear. 🤣😂🤣😂🤣😂 I trained on the Granny, the Clark, the Muncie, and the Saginaw about 30 years ago. 😂🤣😂🤣😂🤣 Tells you how old I am🤣😂🤣😂😁😎

[@blessedbackpacker222]

all we do is rev matching. before changing gears, clutch in then blip then gear shift then clutch out. works like a charm. slight blip while up shifting, slightly more while down shifting.

[@musewolfman]

Why would you blip on the upshift? That just puts the engine speed even further from what it's gonna want to be when you let out the clutch. That, in turn, is going to wear on the synchros more.

[@blessedbackpacker222]

@@musewolfman so that you don't get much rpm drop while upshift and shifts are smoother.

[@Superterminal]

​@@blessedbackpacker222 You will get more rpm drop when upshifting though if you blip it, as it's just adding revs when you want less 🤷‍♂️🤦

[@dougpersoon7467]

I learned to drive on a German made Mercury Capri. One of the first synchromesh transmissions. Then my first vehicle was a '58 Ford pickup. Had crash course in double clutching.

[@slowrider05]

if your car has synchros, double clutching can also help preserve the synchros especially if you’re learning so you don’t destroy them

[@piotrpilinko639]

It's much better to match revs, so double clutching has no sense: gear change should be as smooth as possible.

[@slowrider05]

@@piotrpilinko639 understood thank you!!!

[@U.S_Drifter]

Had to learn how to do this in a retired Military Willy’s Jeep from the early 1900’s

[@jrambo7495]

Lucky!

[@Brianity2286]

they had synchros on those though so that seems a bit pointless

[@dankgankster4100]

I would say the 40s would be mid 1900s, not early 1900s

[@kevinvoyer5053]

The reason for double clutching is to match the speeds of the transmission intake shaft to the output shaft. That’s so when up shifting you give both shafts the time to match their own speeds, but when down shifting you need the extra time and clutch in so you can blip the throttle to match the speeds between the shafts. Mostly in big heavy duty trucks that have no Syncro to match the shafts speeds. Or you can do it to help the life of the synchronizing mechanism that’s built into each gear.

[@jjharson7344]

indeed and with cars that have synchromesh gearboxes - no need for it at all.....

[@badwrong6362]

I drive an an old mitsubishi 4d36 wagon, what is the difference between double clutching and rev matching when down shifting? What I do is I just hold the clutch down bump the accelerator lightly two times then shift then clutch out.

[@cykeok3525]

​@@badwrong6362 Double clutching would be what you're already doing, except that you put the shifter into the center and release the clutch pedal when you blip the accelerator. When your engine is matched to the vehicle's speed for the new gear, you clutch again, push the shifter into the new gear position and release the clutch. If it's properly matched, for that last clutch release you can just let off the clutch fast without any lurch in the vehicle. As others have mentioned, it's not needed since cars have synchromesh now.. I guess you'll be saving a little bit of wear on the synchro if you double clutch? But not really needed.

[@gameon2000]

Only needed this on a 1953 lorry track, I learned driving on. 😂 Nobody needs this on modern cars.

[@Nate-vs8uo]

Drove an old fire truck that needed to be double clutched. Only necessary for older rigs.. Cool video!!

[@ecocav0222]

Double clutching is taught to you when getting the cdl A. But then you just float the gears when on your own driving the 18 wheeler saving your knee and the clutch. At my first driving job the technician told me not to double clutch and just float them gears.

[@davewatchedthat]

Ironically, in some newer transport tractors, they use a “self-adjusting clutch”, so if you always float your shifts (like every competent driver) you will eventually find yourself without a clutch-brake. It’s not damaged; the clutch has just “self-adjusted” itself away from it too far for it to engage. So you have to shift with the damned clutch fairly frequently to keep it properly adjusted. I’ve gotten into the habit of using the clutch to cross over into 5th, and for any full step above that. That seems to be enough to keep it adjusted without making me blow a knee, lol. Darned engineers have it in for us some days, 😂

[@MrTehNoms]

Is floating the gears just rev-matching?

[@davewatchedthat]

@@MrTehNoms Yes.

[@kendallsmith1458]

I had an employer (and the Ryder staff) insist I was wearing out the clutch by float shifting. I just laughed!

[@JohnBrown-ig5nc]

What does floating the gears mean?

[@bruceweirich3733]

Did it in my class 8 trucks. It was easier to do that than replace the clutch after 100,000 to 200,000 miles. Saving the bottom line cost.

[@83BigRig134]

I learned how to double clutch 8 yrs ago because I was told I needed to do it during my behind the wheel portion of my driver's test to get my cdl. The examiner told me I did not need to do it during my test. Though, I got relatively good at doing it then, I have never done it since. I just float the gears and rarely grind going up or down.

[@ButtersReloaded]

Back when I was right outta HS in 04, I bought an 86 CRX (Carb not EFI). It was a manual transmission and I only had to use the clutch to go into 1st gear. I could upshift and down shift with just the accelerator blip. it was a fun little 2+2 seater and I always threw people off not using the clutch that much. Someone actually accused me of having an automatic transmission and that the clutch pedal and the stick shift were for looks. haha

[@synthWizkid]

You're clutch was shot buddy 😂. And are you in Europe? Because all US crx models were 2 seaters

[@ButtersReloaded]

@@synthWizkid nope, I am US. Thinking about it. You're right. It was just a 2 seater. I was remembering that little trap door compartment as a fold down to cover the seat to make a bigger trunk. Lol I had the clutch replaced shortly after I bought it. Still could shift between gears with no clutch if I was quick enough and had the timing right.