Automatic Transmission, How it works?

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The working of an automatic transmission is best understood with help of a 2D animation. This video demonstrates working of Allison 6 speed transmission in a step by step logical manner. Working of reverse gear is also explained here. A good introduction of planetary gear (epicyclic) set is also given at the introduction.

[@salaa23]

"you'll be amazed by the brilliance of this mechanism" me: I am more amazed by the fact that someone once sat and thought "okey i'll invent planetary gearset"

[@claytonjohnson1925]

You were amazed by the brilliance of this mechanisms then 😂

[@sp6450]

Its more a step by step process. Nothing was just invented immediately. It was trial and error, observing and applying adjustments.

[@aljosailic4074]

I swear, i've always had a similar feeling about IC engines in the first place...

[@awepossum1059]

Planetary gearset was invented in BC times

[@moritzjacobs9156]

Gear one: C1, C5 Gear two: C1, C4 Gear three: C1, C3 Gear four: C1, C2 Gear five: C2, C3 Gear six: C2, C4 Reverse: C3, C5

[@faisalrizkiprayoga4036]

if i want to 5 speed and 1 reverse , how many sun gear , planetary gear and reang gear ?

[@nicholasfinch4087]

@@RobertBurik it is fluid. The speed of the motor at specific RPMs engages the clutches by moving fluid around via centripetal force (IIRC)

[@eXX0n]

@@nicholasfinch4087 Almost.. It's mainly governed by engine load. In older cars without electronically controlled transmission, it's governed by vacuum and the detent cable.

[@michaeldose2041]

@@RobertBurik Pre computer auto trans were like the ultimate mechanical computer. There was a governor that sensed drive shaft speed, throttle cable for throttle position and a modulator for vacuum or engine load. The combination of each of those would determine which clutch got applied via hydraulic pressure routed through the valve body and ultimately gear selection.

[@weililim6444]

i see the pattern its make it slightly easier to understand

[@3wGaming]

.....I need a 1D model.

[@sayed1410]

insertrandomcleverusername hahaha

[@patriot1303]

Cracked me up

[@VJETRA]

look from charging hole

[@1guycooperful]

Very good

[@peterstanleysoen1527]

if 1D model so there's only Dots every each gear

[@TheBlackManitu]

manual tramsmission learned in 5 minutes automatic transmission 30 minutes and still counting

[@thomaspinder8869]

haha same here I think i get it for a minute then bang wrong

[@trippytraveler6773]

ATX get very complicated. the valve bodies and plate along with different valves, spools under spring pressure and passageways sized to create certain pressures, guide transmission oil through passageways in the transmission body or in some applications through the input/output shafts to clutch mechanisms that all acting together create the gear speeds.

[@messianichebrewshawnkawcak1550]

The intermediate shaft is what allows it to work, The intermediate shaft is the output of the first set of clutch packs but it’s the input of the second set of clutch packs.

[@diywithkarim4019]

Yes the same me too

[@bwhaz]

As a submarine hunter in the Navy, this is actually my favorite gearing system to have learned about: planetary gearsets. . They are very complicated because of the moving parts. However. The saving grace is just the simplicity of gears, and things to stop gears. Very very efficient gearing design. Pain in the ass to quiet though: it helped tank the Soviet economy and led to the collapse of the Soviet Union.

[@davidcleckley]

Everyone said the 3d animation was too hard to understand. So they took out a dimension and said "if you actually stop and think, you'll understand it" 😂

[@monero.jeanniton]

I hope someone like me still doesn't understand

[@anonymous9739]

@@monero.jeannitonI have arrived sir

[@LJ07EBP]

@@monero.jeanniton i literally dont understand either

[@Triplex5014]

Three things hard to understand in life: 1) Why does the world exist? 2) Women 3) Planetary gearsets

[@andreworam2844]

Easy to explain: 1) God 2) God 3) Crack cocaine

[@guest2007]

2. to give orgasm to female, clitoris needs to be stimulated. clitoris is located outside vagina. intercourse seems does not create orgasm, so penis size maybe does not matter for giving orgasm. clitoral vs vaginal orgasm kzbin.info/www/bejne/iXjNi4Csbrd_b7M some subtitle 0:02 i love penetration i think it's very important to me you have to let somebody into your space you know you have to be willing to relinguish control but at the same time for me the clitoral orgasm is the really intense humdinger you know like damn you know you've got an orgasm that kind of thing but maybe i haven't experienced the right kind of vaginal one. 0:28 clitoral orgasm come from stimulating externally clitoral stimulation primarily or around the urethra around the labia and they eventually reach an orgasm that is more localised to the clitoral area 0:56 when women reach orgasm through vaginal stimulation or g-spot stimulation there are more pelvic contraction more uterine contraction so they often report that those orgasm are deeper and more intense 1:21 something is wrong with me if i don't have orgasm through penetration and every other woman they've been with has had an orgasm that way, i'm like oh really 1:30 i don't tend to have orgasm a lot with intercourse with the penile intercourse, it doesn't happen for me. 1:41 i've never felt vaginal orgasm, it's not something that has ever ever happened to me, i've only been able to reach orgasm orally or manually i've never had it during intercourse 1:52 i've come close but i have not had an orgasm through sexual intercourse 2:00 38% women never had orgasm through intercourse 2:01 intercouse and orgasm to me are separate 2:06 in our opinion an orgasm is an orgasm is an orgasm and it really doesn't matter you don't even need to have one to be sexually satisfied but if you're gonna have one, one is just as good as the other 3:30 freud said that the clitoral orgasm was immature and the vaginal orgasm was mature. 3:45 (dr johnson of masters & johnson) there is no such thing as vaginal orgasm, all orgasm are clitoral 4:00 if you stimulate the vagina with a qtip, you don't get a response but if you stimulate the clitoris with the qtip, you get a response so he concluded the clitoris and not the vagina was sexually sensitive. 4:57 as far as just pure sexual sensation it's all clitoral 5:10 we think penis inside a vagina doing these and i'm sorry that is gonna get it for the guy but it isn't gonna get it for the woman 5:41 well than that means that my wife has been faking orgasm all these years, that's right honey credit : 'cc' button from google (vaginal orgasm vs clitoral orgasm) page 3 result 7 more info : wortel.ucoz.com/orgasm_female.txt training all legs muscles (gastrocnemius, quadricep, hamstring) is good for penis. tips : find '- legs' in wortel.ucoz.com/loseweight_gainmuscle.txt

[@alvaro1728]

1. For no reason. The universe is extremely vast and chances are that a life-supporting planet like this one would have emerged. So here we are; enjoy the ride, it's spinning at 1000 mph! 2. Yes but to get in their pants, it first helps to get in their shoes (sort of speak). 3. Yes but it's just a matter of studying it carefully until it sinks in.

[@gregshowen5430]

Andrew Oram you rock!

[@faustomorelli5471]

Factory e bike

[@stupossibleify]

Agreed. The 2d model is actually easier to understand than the 3d, surprisingly in this case. Superb videos, thank you

[@lucianene7741]

Now my head is spinning at a very high speed.

[@buddyclem7328]

Same here. "This is obvious."

[@m101ist]

Go round round like a record round round. 😲

[@nwabuezeozuzu6370]

I admire your brilliance in presenting this topic in 2D and 3D animations. I also appreciate how much thinking the inventors put into making this our reality.

[@jctyoga]

After watching this over and over for 2 days, I'm finally starting to get it!

[@VERGIS92]

seems the inventor must have solved many rubic cubes, to have the imagination to figure out this gear mechanism

[@weililim6444]

nah i think he accidentally sip on some coolant and survived

[@HtotheG]

I've been speedsolving the Rubik's cube for over 9 years now and let me tell you I'm just as confused as the rest of the people in this comment section.

[@bwhaz]

Nah. They likely were like "hey there's free space in here! How do we fill it?!". It's more like they played Twister more than any other game or puzzle.

[@timjohnson1199]

Didn't happen overnight.

[@mikecimerian6913]

Watch makers ...

[@srinitaaigaura]

Q : How many parts do you need for an automatic transmission? Ans : Yes.

[@225Kristoph]

All of them

[@binishulman8655]

Yes I finally got it! Thank you! My life is now complete.

[@jacob1931]

How is it on the other side? 🤣

[@krishnangshuguha4099]

I envy you from the bottom of my heart

[@binishulman8655]

@@krishnangshuguha4099 keep studying it, you'll get it eventually!

[@trashcan4798]

The 2d animation actually makes it a lot easier to understand. Thank you.

[@Lesics]

Dear friends, I learned the working of automatic transmission from a 2D drawing. It is in fact more easy to understand with a 2D model than a 3D. That's why we thought of releasing a 2D version of the automatic transmission. Different pieces of this video were lying ready in our system for the last 6 months. Finally I got some time last week to do the video editing work and convert them in to a single video. Please help us recruit one video editing professional. www.patreon.com/LearnEngineering

[@fiatmultiplaa]

Thanks for these awesome videos! I wish you have more viewers and subs because you definitely deserve them!

[@Lesics]

Is it ? I thought, I have a plenty of subscribers.

[@fiatmultiplaa]

+Learn Engineering But they don't even watch. They are in-active subs...

[@Lesics]

The problem with LE channel is that we release videos on variety of engineering topics. Someone who has subscribed for automobile videos will not watch when I upload a video on electronics. This is the reason we are not getting good subscriber view count. Otherwise all our subscribers are active.

[@juicyblunts]

I would not be so bold as to say that it is "in fact" easier to learn one way or another, when addressing an entire population of individuals. Everyone has different preferences for the information they take in, and the senses they use most or best when processing that information. Each individual learns differently, where one may find a topic such as this easier to understand with a 2D rendering, another may be better at understanding when visually watching how each component interacts in the system in 3D, while some others may even learn best from simply listening and visualizing, with only minimal processing of the actual visual presentation. It is for this reason that it was wise for you to have posted both a 3D, and a 2D conceptualization, both including descriptive audio to accompany the animations. But that does not mean that your personal preference for learning such concepts is, as a matter-of-fact, the easiest for everyone. Just my two cents.

[@Ancientlaws]

This is interesting, but not going to lie, its kind of hard to follow

[@Lesics]

Yes, the technology is complicated. Hats-off to those engineers, who developed it.

[@bigjoetheelectrician]

Ancient laws lol the 2D one is way better than the 3D model

[@mahfujurrahman-4541]

Learn Engineering uhট

[@dantheveganman]

yeah

[@Vousie]

+Ancient Laws, this is what *animations* are for. They can go on about how it's just as easy in this 2D drawing for as long as they like, but its still much easier when you can see the parts turn. I need to be able to see which parts are currently turning for each gear ratio, as it's just very hard to try following with the way it is here. +Learn Engineering can say what they like about how their way is better, but I just don't find that to be true.

[@Beandiptheredneck]

Ya I typically have a pretty good understanding of the mechanics of cars. I’ve watched a few videos trying to understand the automatic. Still confused. Gonna just assume there is hamsters in there running different speeds for different gears and I don’t need to know why...

[@CyberSage796]

@America Project bruh

[@kensmechanicalaffair]

@America Project Nice.

[@jamesbestaaron5628]

this shud be top comment

[@houston5544]

Lol

[@MrPatdeeee]

One of THE greatest narration and animation teaching videos; I have EVER seen; when trying to learn complex systems. And the built-in feature of "freezing" the video makes it awesome when learning. Also being able to slow down the video makes it even easier. WOW! Yes, at first, it seems hard to grasp. But in time, one by one, you get a little more and a little more, etc. And it won't belong before one says, "Wow I see it now". Some get to this state sooner than others. But unless you are an absolute idiot (rare), you WILL get it. Promise. Thanks to ALL that took part in making this incredible video. For I NOW know how an automatic transmission works. And I didn't know before; even though I am 88 yrs old. It tickles me to death, LOL. WOW! Incidentally: I took "auto shop" in HS in the late '50's, and AT had JUST come out. All we learned was "planetary gears". But nothing else. Today I have "connected the dots". WOW! I feel like running down a road and eating the bark off trees! "Whoopee!" I could never thank you enough! May Jesus richly bless you and yours always.

[@kingslayer2553]

jesus it took me over 2 hours to fully understand this!! thank you!!

[@orangehead484]

Pictures represent better than words, I’d suggest color coding power flow and mentioning input and output gear speeds on the video to make it easier to follow. Best attempt I’ve seen on this topic so far. 👍🏻👍🏻

[@lordchickenhawk]

I'm glad you did both 2D and 3D animations of this transmission. I finally feel like I understand how automatics work.

[@kwunmeichan8013]

1:43 First gear; 2:12 Second gear, 2:40 Fourth gear, 3:02 Sixth gear 3:30, 4:05 Third gear, 4:12 Fifth gear, Reverse 4:21

[@TuneStunnaMusic]

This explained it better to me than the 3d model, but still need both to fully get it. Pure brilliance. Good videos too.

[@wilmarsoaki1831]

Tive que parar, voltar e assistir várias vezes, mas consegui entender, que mecanismo maravilhoso e que excelentes ilustrações e texto. Muito obrigado

[@supertrinigamer]

Honestly I think that having to imagine the rotating motion and having a 2d diagram is significantly more difficult than seeing the 3d model.

[@payforwin6697]

Not for me

[@antikrabe8646]

After an hour of watching this video and the 3D version of this one, I UNDERSTOOD THIS! Thanks a lot! Third and fifth gears are the most difficult to understanding for me.

[@kirosmatavastros]

Okay - so explain now what makes it automatic, cuz i'm still confused

[@antikrabe8646]

@@kirosmatavastros governor in old transmissions or electronics in new. They control the clutches in accordance to driving conditions.

[@protoborg]

@@antikrabe8646 Nope. It uses an entirely hydraulic control system. The electronics just control the flow of the fluid INTO the valve block. A governor controls the flow of gas into the engine. It has nothing at all to do with the transmission. Governors are used to control the speed of the vehicle, not to shift the transmission. Also, there is a torque converter on the front that keeps the transmission functioning smoothly.

[@antikrabe8646]

@@protoborg flow of gas? On gasoline engines air flow controlled by throttle (some engines use camshaft offset instead of throttle, for example EP6, but it's rare) and fuel flow controlled by carburettor's mixture ratio or injector pulse width. Governor controls shifting gears. Not only governor, of course. Just search "automatic transmission governor".

[@sailenkumargope5303]

yet again another piece of sheer brilliance in making tough technical things look easy! thanks.. keep it up

[@ianbudgetrc2574]

After watching this 3x, I got a bit of an idea about it.. It just maims my brain. I haven't fully understood yet. Hopefully in the next 10 to 20 times watching it, I will! Thank you for this exceptional animation and explanation!

[@zerotrace000]

I still can't make head or tails out of this lesson. Instead of understanding six gears I am going to drink a six-pack.

[@gurudevelpr]

Both 2D and 3D gives good overall perspective. Brilliant!!!!!!

[@jimhill6586]

I have rebuilt C-4 and turbo 350/400 auto trans. I have rebuilt manual transmissions when in high school. M-22 rock crusher and saginaw 3 speed. Understanding the servos acting on clutch packs in a automatic is important. This is an excellent video illustration. Worked on engines and transmissions way before you tube in 1974. Learn by doing. Automatics in cars today computer reliant.

[@ogaboga221]

i want to thanks you for your videos, im an engineering student and your videos on motors and transformers really helped me to understand the courses im taking, your explanation are simple and clear, thanks

[@abusaud4062]

Thanks LE team you really made such complicated thing so easy

[@1nterstellar_yt]

You have to make another video with the inclusion of appropriate hydraulics for full understanding of the auto transmission. This video (a good one though) only shows how to achieve certain gear ratios.

[@messianichebrewshawnkawcak1550]

1nterstellar Explaining the valve body may be really difficult, other than that it routes the hydraulic fluid to the proper clutch pack pistons Based on the position of different valves.

[@techero88]

Yes, that’s what it’s missing, how the input rotation speed acheived and how the output is applied to the axel or wheel hub

[@midnightegg4959]

I have a fairly decent grasp on this thanks to the video. The only issue is for my own learnings sake, I've got to build the diagram using something like mspaint, label the clutch packs, and then list down which clutch packs when actuated produce a given gear, in order.

[@mohabshawky4642]

this actually makes it so much easier to understand and now watching 3D its even clearer. ty

[@SDCustoms]

Planetary gear systems blow my mind!!! So versatile!

[@reducedfaticecreamisjustde1447]

I think I can understand how this works: When the gearsets aren't applied, everything tends to rotate at the same speed, but when one or more of the various gearsets are applied, then the gears rotate in contrast with one another which then changes the output speed.

[@sayed1410]

I only understood the first and secont. lost after that. The design of the transmission is brilliant. thank you for the amazing video.

[@diplomatutorial3256]

Such a nice animation and the concept. Thanks for providing a clear explanation of such an interesting thing

[@jace_Henderson]

Um, anybody else actually getting a legitimate migraine from this right now?

[@volkerball3]

I think that was a really good example when 2D is much more understandable than 3D.

[@TheRealChuckNorris]

I thought I knew how automatic transmissions functioned. These videos have me questioning my entire life.

[@BennettHubert]

Learn Engineering, I would have not never understood it without your excellent video. Thank you so much!

[@Djhg2000]

Good visualization and easy to follow explanations, but you sort of skimmed past the torque converter. I happen to like torque converters so I thought I'd fill you in. A torque converter can convert rotational speed into torque; it's sort of like a hydraulic intermediate CVT without overdrive. In addition, most automatics nowadays have a lock-up feature which mechanically couples the input and output to mitigate the fuel efficiency issue. In those transmissions it effectively becomes a large flywheel when it isn't needed. You can tell the difference when driving a car with torque converter lock-up. At high speeds the fuel efficiency is significantly improved over a traditional torque converter and is comparable to a manual transmission. When starting from a standstill you still have the torque boost. The only remaining flaw is the rotating mass of the torque converter, but that's a relatively minor thing. It would be great if you could show how a torque converter works internally. In my opinion it's a seriously underrated engineering gem.

[@YashSharmaFitness]

To understand this I forgot all the 3 manual gears Lol

[@suubireagan]

I didn’t understand Maybe the second time

[@redwren4182]

It's not very well explained. Pretty common for this channel.

[@pankaj160160]

It's so helpful to learn and understanding how automatic gear box work in my new car. Thanks

[@Unique_mineral]

Nice explanation and its more clear and easy to understand it in 2d sectional view. Because i already watch 3d video but get nothing except 1/3 reduction ratio. however i get it 100% in this 2d view.

[@andycdwll]

Manual transmission: Clutch disconnects shaft from motor, you apply desired gear, clutch reengages the shaft, car moves. Automatic transmission: Many clutches make many gears Turn or NOT turn thus producing different gear ratios, thus producing various torque and speed. Think of it as a mechanic numbers counter. You must turn the right most wheel (1) over one full time to next-right wheel (2) to turn to 1. Then next revolution of (1) puts (2) to 2, and so on and so on. Then the multiple clutches come in and my head is about to explode from not being able to completely wrap my head around this principle, and I am going to eat play doh in my pillow fort now untill I find the courage to try to understand this again in a couple of months.

[@shyamalim3797]

but bro ,the car is not having clutch pedal so how do we apply the gears,i couldn't get it.Can you plz explain.

[@youngrozay3576]

@@shyamalim3797 it’s automatic and I think the Sun gear is what shifts the gears for you instead of you having to do it as you would a manual

[@youngrozay3576]

@@shyamalim3797 ye aim commenting you 2 years after your comment bc I’m pretty confused to do just know we all confused lmao

[@Dislob]

@@shyamalim3797 The computer decides based on input / output speed of the shafts, RPM of the engine, speed of the wheels, etc. Its programmed to engage / disengaged specific clutches at specific moments depending on what you're asking of the car. For example, let's say you're cruising in 5th and suddenly start climbing a steep hill. The wheel rotation will reduce because the engine doesn't have enough torque to climb the hill in 5th, the computer will then engage / disengaged the proper clutches to go into 4th. You will feel it a little but since the torque converter uses fluids, it softens the hit of changing ratio quickly while applying power.

[@lafaglobe6025]

2D ANIMATION was a great idea

[@karenthomson9749]

I don’t know why these can’t be explained a bit better than this...

[@m7md4x4]

You guys are AMAZING, thank you for the time and effort in making this channel. I really learned alot

[@rareskeletor5405]

So, if I eat Apple pie, aliens will meet me at 10 o'clock at the supermarket. Also my computers CPU will overclock to 5,69GHz. Ok, cool.

[@rareskeletor5405]

+busi magen Dang. Yeah, why not? I'll try to get there in time. And in fact, I haven't eaten an apple pie yet, so it's all good.

[@donaldthomas7070]

And the going east will get to its destination 1st.

[@eldarm28]

this was easier to understand than 3d for me at least, watched it few times, pause it and use logic to understand and i get it finally :D

[@vanhelsing3225]

The first video I watch was the 3D version because I believe the 3D normally explain better. But the truth is.. I was lost... Thanks to this 2d animation.... Thank you for this very useful animation

[@endorphinsaddict]

Thank you very much! I've finally understood how it works. I just need to watch this a few more times, memorise it and explain to another person to check that I really have!

[@outcast668]

I never experienced a moment in my life where I was both laughing and crying at the same time. I would play this a 3rd or 5th or millionth time, but I'm scared now...lol... So hard to wrap my head around...lol...Aww... Engineers definitely earn their pay...

[@jacob1931]

Ikr

[@flap2380]

It's easier to understand with 2D! Now I'd like to see how double clutch gearbox works (DSG, EDC, PDK, etc.). I've heard about a clutch for even gears and a clutch for odd gears...

[@SCCrazyDriver]

In dual clutch gearbox you activate 2 gears simultaneously, but only one is coupled to output. There is nothing complicated - 2 shafts and when you shift up, gearbox deactivates clutch of shaft 1 and applies clutch of shaft 2... Both shafts goes to common output. As you see, you don't move mechanical parts in such shifting, only switch 2 clutches, this translates into very fast switching between gears. But! This applies only to sequential shifts, i.e. 1-2 or 2-3, not 1-3 or 2-4, because next gear was prepared when you shifted.

[@MythCraft00]

This is beyond brilliant, this is AWESOME.

[@user-yl7gb1yk7e]

thang you very much guys.with 2d model i could understan automatic transmission very well. this video helps you to understand 3D model.thank you

[@WheatleyOS]

Perfect shrapnel bomb: connect all clutch pads at once.

[@aamerjalal6177]

what applies c1, c4 etc?

[@chandr1242]

Thank for ths video...today I learned this in my college but I didn't understand..this video was awesome..thank u again

[@xnopyt13]

I tried so hard to try to understand how it works by watching the 3D version but i still couldn't, now this helps a lot! Thx

[@feonor26]

I'm probably on my 7th attempt to try to understand this fully. I feel fucking stupid

[@andalchen]

how do the clutches move on their own

[@afro1samuri]

they dont. pistons apply them with the help of hydraulic fluid.

[@rightwingsafetysquad9872]

Originally you would have a hydraulic pump spun off the fly wheel and always applying pressure with a second pump off the drive shaft and a valve controlled by the throttle to relieve pressure to determine when it shifts. Now the pump is integrated into the torque converter and there are several computer controlled valves. The exact implementation varies greatly by manufactuerer. I believe ZF, Ford, GM, and Mercedes hold a great deal of patents that make it very difficult to make a good control system for other companies, which is partially why most are moving to CVTs.

[@timjohnson1199]

Nothing moves on its own.

[@asjadazeez]

explained in a very good way. i could understand the mechanism. The video clearly explains how the gear ratio change is achieved, I could understand the gear ratio depends on which of the 6 clutches are activated. but i did not understand how the clutch is controlled in an automatic transmission. need to look out for that.

[@dawnpoint]

The clutches are controlled by hydraulic fluid pressure. Valves in the valve body control which clutch receives pressure to push it closed.

[@WmAHaynes]

This is much easier to follow than 3D model, thank you

[@rob21]

I came here with the question on how a car knows when to change gears at what speed (or RPM) and it didn't get answered.

[@brykkammo3887]

The answer you're looking for is simply within the PCM. The transmission simply makes the change, but the PCM (Powertrain Control Module) is what tells it when and what to shift to.

[@Zerububble]

At the simplest... low engine loading, high rpm, with the throttle depressed - go up a gear.

[@Bszewski]

@@brykkammo3887 but how they did that in an early mechanical manner?

[@munsey9114]

@@Bszewski 3 words: hydraulic load detection Basically (from what little I even manage to understand) There's a hydraulic pump somewhere around the torque converter, and it builds pressure. I'm pretty sure that based on how fast the engine spins the converter it increases or decreases pressure. Lower pressure means lower speed (or a higher load) and so, it will close a spring loaded valve and stop pressure from flowing to the clutch packs that apply higher gears, in favor of applying a lower gear. And visa versa from high speed (lower load) That's part of the reason why many could call an automatic stupid. For example. Youre driving up a hill, and have to increase rpm to maintain your speed up said hill. It will shift up because rpm increased ( and so hydraulic pressure increased) and it opens the high pressure valves to got to higher gear. Making it harder to go up the hill... Of course when you slow rpm, decrease pressure and close high pressure valve. It will shift back down. But Yea. Short and sweet is rpm go up. Hydraulic pump pumps more pressure. Pressure opens spring loaded valve. Spring loaded valve sends pressure to corresponding clutch set, and you shift

[@munsey9114]

Wow. Jesus Christ me. That was wrong. Alright. There's a lot more parts than that. I'm very sorry. I just spent a month in an actual transmission college class, (that's why I was here was to try and study), and past me was forgetting more than just a few steps. The pump does supply pressure, however, it does not determine which clutches apply gears directly. In a hydraulically controlled transmission (old ones), a governor, ( spinny weighted valve) is attached to ( i think. I may have passed the class, but it's still difficult :v) the output shaft. The governor uses cintrifugal force to pull itself in and out of a valve shaft thing to direct the hydraulic pressure to a vacuum modulator. That part, from what I understand, smooths the shift by progressively sending pressure, and determes which shift valves to send pressure based on engine vacuum. High vacuum. High load. Lower gear. And visa versa. That pressure, based on all of that goes to shift valves. Shift valve is opened or closed by the modulator, there are several valves. A shift valve only operates 2 gears. So the modulator desides which shift valve, and the governor decides which of the 2. And now we have shifting. Maybe. I'm starting to confuse even myself right now :v. I know i have the parts right. Im still missing the kickdown and some others. But main control parts are here. Whether i have them in the right order, i don't know :v please do not take this comment as 100% fact. As i said, i passed all my tests and final, but i did that with a textbook right in front of me if i was in doubt :v I'm sure there are much better, more correct explanations out there. And if reader actually knows what they're talking a bout, please correct me lol

[@sloblock1972]

Witchcraft...

[@victormpapuluu6497]

🤣🤣🤣🤣🤣🤣

[@alfong8279]

Very excellent explanation of the planet and sun gears, thanks!

[@seventhdaymusic]

I love transmissions and I plan on specializing in them as a hobby. The automatics are really freaking hard to understand and fix, and that’s why they cost so much to repair. But I want to be a guy who repairs them. I want to be able to fix everything in my truck because I think that would be a lot better than paying someone to do it. I like these videos because they allow me to understand more about transmissions. Thank you!

[@bobbarker3248]

Not to be rude, but almost no one gets their transmission fixed, especially an automatic. Like an engine, if that goes, you're better off getting a new vehicle. That's what most mechanics and dealerships would recommend.

[@seventhdaymusic]

Bob Barker My family had a transmission go out and we had it fixed because it cost less than a new vehicle. It’s not like I want this to be a profession, but I want to at least know how to do it. Plus there are places where I live that are professionals at it and repair them all the time.

[@gRRReg94]

From 3d animation i did not know that hollow sun gear is fixed via another rotating connection to input shaft, couldn't figure 3rd 5th :)

[@Lesics]

Nice to know that, that's the advantage of 2D animation.

[@gRRReg94]

Maybe you could do a video on how the clutches work on automatic, how they are controlled etc. Or why they have used such different design from the manual gearbox, what are the advantages, couldnt they just put electronic shifting mechanizm on manual and call it an automatic?

[@Fearofthemonster]

I always thought they just add an electronic shift to manual to make it automatic. Why did they need this system to make it automatic.

[@johnkanene9031]

life is as complicated as planetary gear set

[@TheSilverBallerina]

I had to watch this twice and take notes, but I finally understand!!

[@don1765]

Thank you for this amazing video.

[@the_sheet]

these videos keep missing something that i need to understand... the best teachers give you that ah ha moment, but this does NOT

[@TheTwoFailerLP]

Fifth Gear got me nuts

[@muthegameonline]

The most useful video in this topic. Thanks!

[@Mau365PP]

This has to be the best explanation of the automatic transmition in youtube, thank you (the 2D was a great choice)

[@LucidDreamer54321]

It works automatically.

[@dultra]

It is hard to learn

[@19Mostar81]

I watch this every day, and all I can say is.. I will continue to watch it..

[@faustinosantander]

Muy bueno, viendo la explicación en 3d y 2d se mejora el entendimiento de funcionamiento, excelente gracias

[@jr52990]

I would have understood this better seeing the 3D model. The 2D was more confusing to me.

[@Lesics]

We have a 3D model based video too. Please check it. kzbin.info/www/bejne/q5DcYoZueJV7o8U

[@jr52990]

Thank you

[@J-C8573]

I find you have to watch both, I started by understanding what could in the 3D video cause it shows what each part is, then I watched the 2D video to understand the working of the transmission

[@sultanabran1]

my life is like C5 and C2 engaged. i don't even know what that means.

[@AminRahimi-1]

complete and great, thanks🎉

[@crazycrookerr]

This cleared it up alot for me. the 3d video was a tad confusing but this 2d video helped!

[@5HT2A292]

On 1:59 it says "OUTUPT"

[@johnadamski9913]

I am mechanically inclined, but I did not fully understand the video.

[@AutomotiveForBeginners]

I've got a 3D animation on how clutch packs work. It's called, "How Clutch Parks Work on a 6 Speed Automatic Transmission: SIMPLIFIED." Check it out.

[@pankaj160160]

Further you were kind enough to make 2D animation after you got feedback from 3D animation. It is really more helpful now. Thanks

[@jhoelpirro371]

Ahora si lo entendí, muchas gracias, excelente video

[@samovarmaker9673]

Roses are red Violets are blue by comparison Some technologies are easier to understand with the help of 3D animation But what about this six-speed automatic transmission from Alison?

[@DontHatemusiK]

3D video would be better. Not a fan of this video

[@thechallengers2536]

Look back he made one 6 months ago in 3d👍

[@beyondmywildestdreams6942]

Amazing video,thank you

[@gabrielp5227]

I'm currently attending automotive school and my next lesson will be about automatic transmissions. Im preparing myself for the mindf*ck this is going to be in 6 days and hopefully I won't mess up the transmission I get to practice with... Wish me luck guys !

[@oldergeologist]

I think he is lying.

[@ZR1Terror]

Ok this helped me understand the concept a lot more.

[@chrisrancat2808]

My intermediate shaft supports a large C ring that accentuates output on the Dzz nuts case. The output is phenomenal.

[@thisisyourcaptainspeaking2259]

I've always enjoyed the clever designs used in hydraulically controlled transmissions. Keep in mind people, exceeding the torque limit of the various disk clutch packs can damage them, causing friction overheating of the surfaces, warping and burning if they're forced to slip while applied.

[@crazeguy26]

some transmission as soon slip is detected in them they go in to limp home mode. the TCM or PCM stops all shifting and kills power the solenoids in the transmission. revers stills works for drive the direct drive gear is the limp home gear.