Transmission Companies are Afraid to Show You This! So I Found One That Will!

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Today Jared takes a trip and gets a behind the scenes look at what makes a Torque Converter work. Learn more about what makes a torque converter stall, and what exactly stall means! Do you has a suggestion for another behind the scenes look at a factory or part? Comment that below!
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[@matthewbenson5913]

Dude. Let the man talk for crying out loud

[@thekidd8169]

A lot of people don’t know how to ask a question and keep your mouth shut until the person has finished or starts to circle. Easy work.

[@IANHANDS]

Whoa . Fella

[@IANHANDS]

​@thekidd8169 How did you become so perfect . Just asking like

[@haircut2015]

Yes let him talk as he knows what he is doing and you do not...

[@chublez]

​@@IANHANDSdon't need to be a firefighter to spot smoke.

[@YZFoFittie]

Seems like you guys missed a big chunk by getting sidetracked. No explanation of the purpose of the one way bearing, nor what actually happens when stall speed is reached, etc.

[@dan725]

Man thanks for digging up these highly-knowledgeable guys like this dude from Boss Hog to effortlessly teach us the inner-workings of these Torque Converters! This was insanely educational; and also he’s so good repping his company on the several improvements they’ve made over OEM. Beautiful pieces of engineering and American manufacturing on display here! Great video! Thanks Jared!

[@JCWren]

Torque converters are still magic.

[@NickTaylorRickPowers]

Fluid magic

[@Rekuzan]

Black Magic!

[@DrFiero]

@@Rekuzan Red magic. If it's black magic, the magic has already burnt up. :D

[@Rekuzan]

@@DrFiero Yeah man, there ya go!!! 🤣🤣🤣 Although I think Clarkson referred to it as black, not quite realizing what he was saying!!!

[@OttawaOldFart]

Pretty well LOL

[@mattbrown5511]

A giant "Thank you" to Boss Hog for showing you around and educating us all. Thank you, Jared, for doing all the hard work to bring us this information.

[@jimrobin98]

the torque convertor is one amazing piece of hydraulic "coupler". Just to think of all the abuse it takes and still works is amazing!

[@LarryHeagren]

I still love watching "How it's Made". Thanks for the gear head version. Torque converters have always been that "Black Art Magic" thing. Seeing the internals was interesting. Thanks.

[@christianmeeks4430]

I used to work at LuK Clutch (now Schaeffler Automotive) would like you all to know, that copper stuff is copper brazing paste and a completely common practice in torque converter production. Every single clutch, pump, and impeller produced there had the vanes brazed with copper brazing paste. Lastly, when they put in the 6th production line dedicated to 10R80 and 10R60 torque converter production, we hit 1000 pieces produced in the covers section in 8 hours.

[@garymartin9806]

I worked for DACCO torque converters for 21 years and probably built 100,000 of these

[@cdoublejj]

hell yeah man!!!!

[@baims8367]

What the best stall speed for 3000 circle track car 232 / 232 @50 108 LSA 3:73 rear gear car ?

[@patrickwarden2933]

what brand do you recommend for 6l80? these look well made

[@markbrown-us4xe]

Flash backs of working at HydraMatic for 32 years. The press that stamped the shell would shake the building in assembly 3/4 mile away. Willow Run Michigan. Now I know why the Engineer's were so stressed. Great content and Thanks.

[@michaelmonday418]

When I hear someone say, I think I burnt up my torque converter. What goes bad in them, or what causes it to fail?

[@djmips]

That was really nice of Boss Hog to let you come and bug them for our pleasure. Thanks Boss Hog!

[@oneninerniner3427]

Dude talks too fast and too much. Let the guy you're interviewing talk. Y'all kinda got the main points across i guess🤔

[@williamstamper442]

As an ATI customer for years, i remember about 20 years ago, 2004ish, that same company was pushing a converter cutting and welding machine. "Start your own business or build upon the business you have" The product was not terribly expensive for what it was and did, i believe $150k or less, cnc controlled with a user friendly interface "anybody" could use. Even a flush process was part of this unit, making it a complete tool from start to finish for any trans shop for sure. Also beneficial to certain race car shops. The guy who got that unit just for his home garage was very serious in his program. I actually wanted to get aboard on this unit but the money just wasn't there. Can you imagine the possibilites of this machine however, if you are a serious drag racer? The no prep scene could be yours locally once you learned to build a converter for each individual application to get down a poor surface with 4 digit horsepower! Your car is completely different from the guy or gal next to you...but what if i can make you a unit that works perfect for your application? If so then id be the man and wouldn't be poor right now. A cnc mill and a trained operator could whip up endless stators to dial your combo in and that ATI machine could have put it together. Did i mention the equipment also had capability to static and dynamically balace the unit? I dont think the resolution was that high but better than your average rebuild shop which don't balance a "rebuilt" converter at all. A cnc machine to make stators for custom converters could also help develop impeller wheels for your favorite turbo charger too... Dang i should have went with this and pushed myself back then in 2004. Id be sitting pretty right now. Id have been the "magic converter doctor"! Oh well, its healthy to dream, even about the past, as long as its positive.

[@Bidmores]

this is an awesome reflection but it makes me really curious exactly how the complex process of building case specific converters could be learned efficiently. It seems like so many darn variables.

[@russelljacob7955]

The talk about 'cannot just put in a torque converter' I think back to when I did temp work for a tow company. They had just gotten a new transmission into a truck. Put in one with a bit higher stall. That transmission under any load became only good for boiling trans fluid.

[@russelljacob7955]

@georgesanford3719 Yup, it was. Not my truck. All Automatics have a stall speed. Is how a torque convertor works. Issue is they put in one not suited for the job on an overhaul.

[@arniebriscoe2978]

I have been using the Boss Hogg convertors since back in the mid 70's. Back then "affordable and quality" stall convertors were hard to find. I don't know how many Boss Hogg convertors I installed in customer cars, but can honestly say I never had a failure, great product.

[@jdmmurray1023]

Excellent job, really enjoyed that! I was wondering if you’ve ever heard of a torque brake it works like a torque converter except your driveshaft goes through the middle and one half is bolted to the frame the other half a spline to your driveshaft and you have a lever that introduced oil into it and it slows you down using the same principle as these torque converter‘s, they used to use them on old quarry trucks with the cooling system of their own, just something you might wanna look into. Thanks again great show!

[@carlsing1190]

I’m hoping you can go to Callahan Auto Parts and check the specs on the Roto Gurter

[@davebarron5939]

This hits home, I learned how important the "stall" is to your specific application. Long story, OEM stall, lots of LS power, too light a car, and I had all I could do to hold the car sitting at stop lights (standing on brake). Went to a 2,500 stall, and boom! PERFECT, and car is a rocket!

[@jontnoneya3404]

AWESOME! I absolutely LOVE to geek out on stuff and get really fired up to learn things I don't know. Cars have always been a big black box to me but as I learn a little, I feel like I'm pulling back the veil and seeing that so many different aspects of them make sense. BUT Torque Converters and Transmissions.....still confusing and crazy complicated to my brain. At least right now. NONE Of those fins make any sense to me but they will. Thanks for all the indepth info. LOVE seeing these types of vids. AND You were a better version of "How it works"!!! Well done!!

[@tylerkeller4281]

Just went over this at school it took the teachers day 2 days to explain and I was lost and now I understand them after this video

[@NickTaylorRickPowers]

You'll find some people don't know exactly what they're teaching you well enough to break it down into understandable pieces or analogies

[@____MC____]

It helps to start off with a camshaft thats meant for the vehicle (not a car cam in a heavy truck). Its a crapshoot even for the converter manufacturers to get one to make your combo work. I found that out the hard way.

[@ryurc3033]

Ah yes, the magic slippy jelly doughnut of automatic transmission motivator.

[@fredstarr9690]

Hey Jared, great video! I love to see the inner workings of stuff like that. I have a good one for you to do next if you can. I have the Holley terminator X on my 59 corvette resto mod. It has a ls2 and a Tremec 5 speed. I installed the terminator X on my car and it works great but I have no idea how it does what it does? It should be pretty easy for you and Holley to explain how it all works.... maybe not. I would love to see a video of you at Holley, see what you can do thanks buddy love the channel.

[@davidroberts6594]

I wished he would just let the boss talk without interrupting, boss is trying to explain

[@mistermoonshadow9188]

When I was a kid, my parents had a '62 Buick Invicta. My mom loved that car! Smoothest experience ever---because there were no gears! It had DYNAFLOW, which was a variable vane torque converter. Big V8 engine that just smoothly moved forward with no "shifts" as speed increased. It was "slow" to accelerate, but mom was fine with that!. (I was too young to know how Reverse worked. ) I don't know how the vanes were varied.

[@n.mcneil4066]

Buick could have used the 4 speed Hydra matic in their cars but they declined. They didn"t want all of those shifts. The Dynaflo was equipped with drive, low, & reverse but no upshifts. It"s operation was so smooth that it could be equated wit CVT transmission.

[@haircut2015]

Are you sure No gears ???

[@KingKeson]

Always a great day when Jared uploads! I can’t wait to see where this series goes! I’m all about the behind the scenes! Jared you are appreciated for all the knowledge you share and the positive attitude and passion you show while doing it! Keep up the Grind!

[@razerbrosdynamics3917]

Torque converters with lock up have existed since the 50s at least. Packard had lockup in 1st and 2nd, making a 2 speed appear to be a 4 speed. there may be more, but thats the specific one I know of

[@rexkean]

Thanks for the info about the "Magic Ring"! Always wondered how they worked

[@EJWORX]

I love it. Keep them coming. Super educational for the city slickers that don't have wrenching spaces :-).

[@AnthonyRBlacker]

Would you call 'spray arc' welding "sparc" welding? Ha. Ha. edit: I do the (did) the same Jared.. I'm a FAN of learning. I was lucky enough to have had a tv by 10, wow.. 1988 my parents were cool as hell.. we were poor but they got me a television back in the day well anyway, yeah man educational tv was ALL i ever watched. Still do the same today with KZbin.. : )

[@Cougracer67]

There is no "magic" in a torque converter. It's just basic physics and fluid dynamics.

[@ericdolan2130]

25:27: "Not going as much into the metal"...That is not correct. Spray arc has far more penetration than that of Short Circuit or Globular Transfer. Great video overall.

[@georgeferlazzo7936]

Hello again, Jared and Crew Thank you for another Great Video 👍 I learned quite a bit. Again thank you 👍

[@mwqs1]

Excellent deep dive video. I love learning about this stuff😊

[@TheQuestionableGarage]

Glad you enjoyed it!

[@kickasspowdercoating]

Loved the episode it’s neat to see the insides of them after having replaced hundreds of them ! And the spline tool so cool never thought it was done like that 👀

[@braxtonnelson5375]

I'm sure I speak for a lot of others when I thank you for throwing a little "learnin'" our way. I've understood the basics of a torque converter for many years, but nothing beats actually seeing what is going on inside one! Maybe you can expand upon your teaching to explain and show us how other automotive parts and systems work, and why they go bad. You'd be surprised to see how many folks don't understand how a starter drive/bendix works, or an alternator, or even a simple relay. Thanks for taking us along!

[@Lifeistooshort67]

Perfect! I always enjoyed how it's made. It's like looking behind the curtain at a magic show. This is especially true at a professional torque converter facility. How about double adjustable coilover shocks?

[@ijbolton1985]

I've seen transmission tear down videos but the valve body for automatic transmissions have been crazy n how they work. Can you make a video on the valve body and how it moves fluid to change gears?! Thanks for making the great content!

[@davebrown9725]

Thanks to all at Boss Hog for this great field trip. Seeing the internal parts, how they work together, and details like lock up and stall speed differences on the parts was incredibly good. I can't wait to see Johnny Rev back on the road, and I am eager to see more of these inside component field trips.

[@robertborgeson1821]

Wow. What are great video. Torque converters are still a mystery to me but at least now I can pretend to understand how they work when I talk with my friends.. about to go check boss hog out right now for my 4Le. Never heard of them before but after seeing inside their shop and the high quality work they do I'm much more comfortable with them than anyone else.

[@pebrede]

Great video, was hoping to hear how much torque multiplication the various stator angles give, maybe part of his secret squirrel sauce. Looking forward to the series, keep at it. Take care n play safe.

[@dylanromine4101]

The pump click is actually the last click

[@danielgarrett1155]

Great video. I'm always looking to understand more of the voodoo going on in the automatics. I think cams should be next. They are very dependent on the combination as a whole. I could use a little more understanding on how to select a cam for a given combination. There are a lot of videos about selecting cams, but maybe you could put a little different perspective on it than what we have seen out there already. Js

[@twodogsyyc6729]

We had OTA over the air TV. Good rabbit ear antennas got you 3 channels or 1 channel if you had crap ones with aluminum foil on them. Luv the vid Jared

[@UCm0i6w5lBlRthCtZEoj99tg]

I'm only a few minutes in but I hope Jared gets his own how it's made style jingle 🤣 I loved the same TV shows growing up too

[@marvinschleicher5542]

I enjoyed info on torque converters, but I still not sure how they work. Some info kinda confusing. Thanks

[@starkyslp16]

Clear as mud. I'm sticking with "magic" 😂

[@richdurbin6146]

I’ve watched so many explanations of how torque converters work, and I still don’t understand it.

[@TheQuestionableGarage]

I think I’ll try to come up with a fun follow up as a short or an insert into the next one!

[@Michael666CA]

​@@TheQuestionableGaragehow about explain what fails in the converter

[@07wrxtr1]

Basically the rpm is what determines when it locks and unlocks? That’s my vast over simplification…

[@avelord6135]

If I remember correctly, Clarckson was asked if he knew how a supercharger worked and his answer was "wichcraft" 😀

[@motomuso]

It's pretty amazing how early in auto history the automatic transmission came about. Those pioneers of automotive engineering were no dummies.

[@xnavyro]

I’m more confused now more than ever? How bout some graphics or video to show the fluid flowpaths?

[@bensabelhaus7288]

Very cool. Planning to visit Precision torque converter in Iowa? I did a short stint with them warehousing out here in WA and they are probably the nicest people you will meet. If you do, say hi! Ben

[@oneninerniner3427]

Precision is a pretty good company. I've used their stock replacement converters on my stock daily driver trans rebuilds and have had some custom high performance & race converters built by them as well .

[@johnguilfoyle3073]

A Torque Converter connects the spinny bits in the engine to the spinny bits in the Automatic Transmission.

[@groermaik]

Like Captain Picard says, "Make it so."

[@genericsomething]

I love factory tours, and I hope you make many more videos like this. I hope more manufacturers are open to you visiting, like Boss Hog.

[@gerryfinch2014]

The original “hydramatic” transmissions had a “fluid coupling” device with no torque multiplication. Do the first gear was very low. Later “turbohydramatic” units had a torque converter that “ multiplied” the torque. Hence the first gear is not as low. What exactly is the difference in the two coupling devices?

[@johne189]

The fluid-coupling is of two-element design; picture a fan's air flow directed at an identical un-powered fan to drive it. The three-element torque converter adds the stator and its ability to redirect "driving fan's" output to more optimally turn the driven unit for a particular load requirement; reaching cruise the stator eventually free-wheels and becomes irrelevant. The video references stock and modified stator function several times.

[@joshrootz8355]

More videos just like this!!!!! Love this

[@cory45x]

this is the same concept describing how turbine engines work.

[@SerbanCMusca-ut8ny]

Me before watching this explanation on torque converters: "It's just magic" Me after watching this explanation on torque converters: "Oh I see, it's dark magic"

[@Enjoymentboy]

Wait!!! Hold on!!! All these years I've thought that the factory trapped magic elves and locked one inside the converter, and occasionally a gremlin would be caught by mistake and that explains why a converter would just fail for no reason at the worst possible moment. You're telling my my high school shop teacher LIED to me and just either didn't know how they worked or didn't want to go through the trouble of explaining it? Man...now I don't know what to believe.

[@windward2818]

Owning a Miller Welder myself, I guess I am a little confused by statements made in the video. The Miller XMT 350 CC/CV shown welding the TC in the video, as a base model, does not have pulsed spray arc transfer welding (Pulsed MIG as described by Miller), it is however, a very good MIG welder for steel, and in the video they have it dialed in for a low penetrating structural weld without much splatter using the welding turntable. The Miller XMT 350 MPa supports Pulsed MIG and is more expensive than the XMT 350 CC/CV base model shown in the video. So just to be clear, for the application I don't think you really need the Pulsed MIG feature. A dialed in MIG with a turntable and holding jig will work just fine for a top down level fillet weld. After the final weld and broach do you need to final balance the torque converter when at speed without fluid? I think if all the parts are neutral balanced and the final weld also balanced then the assembly should be neutral balanced without the need for a final balance test. However, I was really expecting to see a balance check after manufacture.

[@JTLaser1]

Ya know… I watch a lot of videos about Astro physics. I invented and patented a new kind of laser optics for use with X-rays. I am TOTALLY baffled by this conversation! Very interesting, but not a single thing I’ll be able to talk to my “car guy” brother! 😂

[@mickstermouseter7059]

I wish I understood everything that was said in this video. It's very interesting, but I would love to understand it. I was a jet mechanic in the USAF in the early 1970's so I understand stators and how they work, but I just don't understand how these things work. You can send a great torque converter for my 2012 Dodge Caravan 3.6L so it works the best that is possible.

[@oznetyoutube125]

Automatic Transmission " The world's Most Complicated Hydraulic Pump" 🙂

[@hotrodlincoln7186]

Wht would you recommend for my 06 town car? I am thinking of putting 4.10 gears with lsd diff. I have a 4 speed trans. I have all 4 cats cut off and have 2 pypes high flow cats threw a 2 1/2 piping to a X pipe out a roush axle back exhaust.

[@kylepopell3585]

Why do you talk to your audience like there’s a bunch of third graders watching we’re all adults here we know what a torque converter is. We know what a input shaft is. It’s known that there is a transmission there. It’s known that there is a driveline. Most people know the parts of their car that they’re driving. They know there’s a functionality going on there somewhere. Yes I’m throwing sarcasm at your KZbin channel. Hell I’m just tired of the boredom talkfrom everybody produces KZbin channels everybody talks to like there’s five graders watching your channel. We’re not very much grown adults. Talk to us like adults. Thank you.

[@jasonbennett9851]

I'm still confused!!! ... what's the difference between 2300 and 3000 stall ... what does loose vs tight mean. What's better for street use vs towing vs racing?

[@KHALABEEB]

Transmission rebuilders would be cool next

[@garychandler4296]

"BOSS" has been around torque so long his glasses are twisted! I may be wrong but, do I understand that if I put freer flowing exhaust on a stock truck, the lockup might be sooner? My Dakota 4x4 gashog seems to need it.

[@bobsmmrs8712]

Very interesting! I’ve been curious how BMW is hoping to use torque converters to replace dual clutch.

[@joshuagibson2520]

I love watching Jared compared to Tavarish. I just can't watch Tavarish. Nope.

[@A2J_Tim]

rotating mass absolutely effects HP on the dyno, I have a video proving this with a balance shaft delete on a 4 cylinder car, then a light weight flywheel again picked up hp.

[@Flyinghook]

No, it's actually Toyoda. They only charmed it because they were worried how it would sound in English

[@jerrywilcox9890]

Not what they call them in the US

[@jerrywilcox9890]

Ya Toyota sounds way better

[@mikekozi-lester3887]

Hi Jared nice video 📹 and workmanship!!!

[@williamhardes8081]

automatics are magic! what they show you is edited for the cameras. they don't show the elves! BTW. you said 1 to 1 for the engine to gearbox through a clutch. so why does my clutch feel like a inefficient torque converter once my wife drives it?

[@ark-mark1]

Practical experience allways outweight schooling. Schooling has only advantage in quantity as it is not practical to make every worker practise for years to be able to work. Master crafts men are allways under estimated by the academic people. Ofcourse we need both but the appreciation should be more balanced as we need intelligent people in working class aswell or the production do not get so much new ideas. This company and the owner talking about "WE" sounds so good and it is that exact reason they are a leading trademark in the business.

[@7mgte490]

Just realized a automatic torqueconver ,,, is a 747 airplane ✈️ engine.....

[@zAvAvAz]

Yesh! Great job.

[@trevorjlewis]

Jeremy Clarkson said about automatic transmissions, "power goes in, magic happens, disappointment comes out"

[@MarkK01]

My dream would be to win the lottery, retire and just go from place to place to see how things are manufactured, I was and still am a huge fan of the TV show How is it Made and other shows like it. Thank you for sharing how a torque converter is made and the different functions of it.

[@MidnightOilsRestoration]

So when a torque converter is flashed…what exactly is taking place? It appears that once the internals of the converter are set and welded together that would be the end of it, but I know “flashing” the converter will adjust the speed of it.

[@edwincolon7782]

Those internal tubines are artwork. On my list of vendors for sure.

[@Mr-pn2eh]

Engine block builder Exhaust builder Headlight builder

[@NamesGolden]

would have gave you a free place to stay if I knew you were in my town. didn't even know there was another torque converter shop here other than ptc

[@MrTheHillfolk]

Torque converter function can be mimicked with 2 fans. Power one up,and place the other in front of it while its running. The unpowered one is what drives the trans.

[@dan725]

I wonder if additive manufacturing would drastically improve TC’s. Without worrying about awkward welding angles and CNC tool paths, I wonder if one can eke out even more efficiencies with more efficient designs without worrying about toolpaths.

[@greatbull67]

Thanks for this one. I like to know the how and why of things also

[@joshm3342]

This was like a virtual, adult field trip. Thanks!

[@thomasthompson2084]

A lot of good information for high rpm and drag race guys but I'd like to see more for us big block lower rpm 4x4 guys who need it for climbing or towing

[@gregquinn6827]

Pouring here too. Lucky for you, or I would be welding in the boatyard, instead of watching.

[@MitzvosGolem1]

Old GM in 60s had torque converter blades would change angle for more acceleration.

[@died4us590]

When i was a kid living in the country, there were only three channel's lol. We didn't have a lot to fight over. Now, i watch car related media, history , and other stuff about how thing's work or are made. I don't watch tv or go to movie's, don't know what went wrong with the kinda stuff they make now. I turn 53 this month, and growing up it was a lot of free child labor, but it was labor that taught me a lot. G-d bless.

[@nate_d376]

Yeah, not many choices back in the early 80s. But I only had 1 kid brother, so being the oldest, I got to choose, and he had to hold the antenna! Lol

[@squiggyg.8415]

We used to live in the city, and we only had three channels

[@dans_Learning_Curve]

One channel.

[@morganweast4228]

Like the song says 57 channels and nothing on.

[@joshrepik]

Don’t be afraid to say god when you’re spreading love

[@djmyth84]

I am so happy you made this video. I always had manual,so this answered so many question for me

[@squiggyg.8415]

I think Jeremy said power goes in, confusion happens and disappointment comes out or was that you. I heard it last week and forgot who said it that way. I watch too many automotive channels 😎

[@bgee461]

When i was rebuilding my odyssey transmission, i cut open the torque converter for this exact reason. It was still magic so that was that.

[@kirb743]

I wonder if you didn't show the machine that welds the halves together because the competition owns that machine

[@GrandePunto8V]

Now wait for keyboard warrior comments on why you "can't weld on a lathe"... 😁

[@turboboy0]

this is what STACEY DAVID from GEARZ does.

[@ericsfishingadventures4433]

I've always wanted to learn a simple breakdown of a torture converter, this was perfect! And magic!

[@RyshusMojo1]

The future: Converters with wi-fi or bluetooth controlled variable pitch.

[@erikthie2253]

Torque converters sometimes fail. Based on the information you gave today, can you tell us the failure points?