I'm sure this is the only video made that explains all 3 types of converter clutch setups with an easy to understand description of the fluid coupling inside the converter. Highly underrated channel! Much better than any of the other more popular channels on UA-cam hands down.
Thank God that you can not only teach but actually do the rebuilding! I"ve been to college for automotive and I"ve learned more through the internet than I ever could have at school. I will admit that until you get hands on you only have head knowledge! Thank you so much foe your knowledge and expertise that you share with us.
Sean, you opened my eyes - thank you ! For the watchers/readers: Sean also wrote superb articles related to transmission for the Gears magazine. For example: the article he wrote for the May/June 2007 issue of Gears magazine titled "Honda 5-Speed Clutch Pressure Control (CPC) saved my Odyssey van from the junkyard ! Sean, thanks again and again !
I fully agree with everyone else here: best TC video on this platform! One minor suggestion though (me coming from the aviation world): watch some videos explaining airplane stalls. I had to smirk at Sean's theory ;) Still, a definite subscription for me!
Do old 1970s torque converters have stators and clutches too? I have a Mercedes 250 1972, which drives fine while the cold engine when getting hot drives fine except at stop signs likely the torque converter is locked and the engine wants to die because tranny is engaged. I have to rise RPM to not die. wondering if TC can be locked. Thank you.
Thank you for your work . Can we use a 4L60E from a 4.8L engine and put it in on a 5.3L engine? do we need to flash/ reprogram? 2006 4.8L trany on a 2000 5.3L Silverado extended cab
Could a torque converter lock up and make the engine seem to be locked? I have a 99 Ford F-350 pickup with a 7.3 diesel engine it is 4x4 as well. The pickup Sat for about 5 years. WE tried starting it but the engine seems to be stuck. It doesn’t make any sense so I’m wondering if the TC could be the problem. Your thoughts?
hello,sir,im struggling with my bmw e60 525d torque converter.Imagine you are cruising with speed of 100km/h and the car just shaking due to rpm changes.Is it possible torque converter clutch is slipping and causing these symptoms?
What is your advise about gearing down with one of these new types of torque convertors? Advise on the internet seems to be that we should use the breaks to slow down in an automatic, but some people still say it is fine to slow down using the gears?
Do you mean like manually shifting to lower gears for engine braking? I don’t think the converter really minds that. Many vehicles have tap shifters to allow you to control the gear you’re in, so it’s not unexpected or uncommon to have the converter drive the engine during braking.
@@siuautomotive when coming to a red light in my automatic, is it "safe"(aka not weardown parts unnecessarily) to take my feet of gas and only apply brakes when the car has slowed down and im getting close to the red light. eg: while going 50mph, when im about to approach a red light, id take my feet of the gas when i'm at 50yards away from the red light and apply the brakes in the last 10yards. does this practice wears down my car parts faster?
Aye friend I recently swapped the engine on my sisters 04 scion and wen I put the bolts into the torque converter was a little tight well I left it like that started the car drove it for a couple blocks i had to floor it so it can move at a stop and after that didn't wanna move forward or reverse what can it be?
That’s a common assumption, but the stator, when locked during torque multiplication, redirects the fluid in the same direction as engine rotation. That extra “push” is what allows the engine speed to climb higher. If the stator always freewheeled, it would never get that extra push.
Front engine,, rear wheel drive.. Fluid is forced in the impeller centrifugallyfrom the interior of the impeller to the exterior of the impeller. Fluid traverses into the front of the vehicle, into the direction of the engine/crankshaft, away from the brake lights. The fluid runs into the turbine at the exterior of the turbine down into the interior of the turbine. The fluid Traverses towards the rear of the vehicle, away from the engine, The fluid is now moving to the stator. The stator brings the fluid towards the interior of the impeller completing the toroidal flow of the viscous fluid, transmission oil.
Does the clutch engage strictly by fluid pressure, based upon the specific engine RPM? Or is it electronically controlled by redirection of fluid to special port (s) that pressurizes the clutch?
I would be glad if you could answer the following question: going down a very steep slope with a 4x4, in first gear (let's suppose it has a TH400), to obtain the maximum level of engine braking, does the torque converter stator rotate way faster than the engine (due to its one-way clutch and to the way the ATF touches its blades) or does the torque converter stator rotate at roughly the same speed of the engine? I mean: engine speed 3,000 rpm, torque converter stator speed 6,000 rpm, is it possible?
The stator is splined to the case and rotates at the engine rpm unless the stator is free spinning. In your scenario, the wheel rpm is kept low with low gear ratio to use engine braking. Assuming a steep downhill, you are probably reaching the “stall speed” of the engine, or 3000 rpm in your example. But your wheel speed and therefore your turbine speed is well below the impeller speed. The one way clutch of the stator will be engaged and the stator will not free spin and rotate at the impeller speed. The only time the stator speed will exceed the impeller speed is during the rotary phase when the turbine has come up to speed. This is when the ATF might hit the back of the stator blades to allow free spin of the one way clutch where stator spin will exceed the impeller speed.
My stator gear rotated clock wise and counter clock wise.....is this normal. My car made weird noises in reverse and drive, leaked really bad when in park, and had very bad acceleration. Thanks for the video.
When you try to move the stator with your fingers or a stator support in your hand, it will rotate in both directions since you are holding onto the inner race. You should feel the one-way clutch slip in one direction and grab the stator in the other direction. It could be the source of poor acceleration, but it shouldn’t cause a leak unless the converter internals are coming apart and it tore up the hub or seal.
@@siuautomotive the inner gear” behind the stator is moving around” which explains why the torc converter was hard to get on. When I pulled the engine, the seal was in good shape, the leak was coming from under the bell housing.....I took it as a bad seal but there was no indication it was worn out. If I had a tool.... a Could’ve did a pressure check, I’m gonna replace the torc converter for a peace of mind.....thank you for the speedy reply.
TC has 3 connections to the AT side. 1st is the pump driving tube sticking out from TC case(often with 2 notches or 2 tabs at its end),which match to 2 tongues or 2 tabs on the pump rotor in the front of the AT. 2nd is the bigger female spline in the TC stator one way clutch hub, which meshes with stator tube male splines from the back cover of the AT pump(motionless with AT case). 3d is the small female spline in the center of TC turbine, which drives the male spline on the end of the input shaft that sticking out from the AT.
Yes, in tcc release mode it travels through the tip of the input shaft to feed the converter. In tcc apply mode, it enters between the input shaft and stator support shaft
I don't think so, because there are no oil circuits or solenoids to control the fluid for the powerglide. But who knows (not I), someone might make a kit.
@@siuautomotive And a lot of rattling and squealing! It sent metal chunks from the springs in the one way roller bearing throughout the transmission so I ended up taking it apart and cleaning everything while I had it out to put in a new torque converter. I had just rebuilt the transmission a few months ago so taking it apart again was a breeze.
According to LuK, the torque converter was invented in 1905 in Stettin, Germany, by Dr. Hermann Föttinger of the Vulcan Ship Yards, the torque converter was originally a steam turbine drive for a ship propeller. www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/symposia_1/downloads_11/01_Torque_converters.pdf
Good day everyone. Am currently in my 400 level (Automotive Engineering) but am still finding it difficult to understand Automatic transmission. Please any guide from an expert? Someone I can be communicating with anytime am lost and guide me through. Thanks to SIU😍😍😍
Converters are TRANSMISSION COMPONENTS and are INTEGRAL to the transmission and one is useless without the other. A converter is not to an automatic - or powershift - transmission what a clutch is to a manual. A manual can "work" without a clutch. A clutch can be used to 'limp home" a manual trans not completely "blown". "Building" an auto without replacing the converter AND "external" components like coolers may be a "build" but it is not a "rebuild:.
Hello! any idea where this sound come from? ua-cam.com/video/WTbE2AYhhf8/v-deo.html The transmission has been rebuilt, torque converter as well. there was no such sound before. Thanks!
If UA-cam had existed when I was a teen I would literally know it all by now…
I'm sure this is the only video made that explains all 3 types of converter clutch setups with an easy to understand description of the fluid coupling inside the converter. Highly underrated channel! Much better than any of the other more popular channels on UA-cam hands down.
Wow, thanks!
This is hands down the best description of a torque converter I’ve ever seen.
I Agree with you 💯 👍
Thank God that you can not only teach but actually do the rebuilding! I"ve been to college for automotive and I"ve learned more through the internet than I ever could have at school. I will admit that until you get hands on you only have head knowledge! Thank you so much foe your knowledge and expertise that you share with us.
I had to watch quite a few torque converter videos before I found one that showed which direction they turned. Great job.
Sean, you opened my eyes - thank you !
For the watchers/readers: Sean also wrote superb articles related to transmission for the Gears magazine.
For example: the article he wrote for the May/June 2007 issue of Gears magazine titled "Honda 5-Speed Clutch Pressure Control (CPC) saved my Odyssey van from the junkyard !
Sean, thanks again and again !
I fully agree with everyone else here: best TC video on this platform! One minor suggestion though (me coming from the aviation world): watch some videos explaining airplane stalls. I had to smirk at Sean's theory ;) Still, a definite subscription for me!
This Videos deserves more likes, comments.. Thanks a lot for explaining it very clearly with physical parts and your analogy.. GREAT WORK :)
I finally understand the mysterious torque converter. Thank you so much.
you are a very good teacher I now understand how the torque converter operates thanks for the good lectures
Great clip.. 👍👍😊
Probably the best episode as far as Torque Converter is concerned.. 👍
Very elaborated and very informative.. 😄
Thanks friend
This instructor knows what students dont know.
Best explanation I've ever seen (and I've watched a lot of them!). Finally understand it!
Outstanding explanation of the transmission torque converter
Awsome video, what would be even better is explaining torque converter shuddering. My 6F50 in my 2007 Lincoln MKX shudders a lot.
Very interesting ,great video,your a natural teacher,thank you!
Great video! Thank you, finally I understand how it works 👍👌
This is very informative and helps make sense how a transmission works. They are the big mystery in an auto to me. Thanks
Very good video, thanks for making it available.
Do old 1970s torque converters have stators and clutches too? I have a Mercedes 250 1972, which drives fine while the cold engine when getting hot drives fine except at stop signs likely the torque converter is locked and the engine wants to die because tranny is engaged. I have to rise RPM to not die. wondering if TC can be locked. Thank you.
Love this video - so well done. Thank you!
Appreciate you Sir 🎉🎉...what a knowledge...Great...thanks in tons ❤😊
Interesting video. Thanks for the information.
Thank you for your work . Can we use a 4L60E from a 4.8L engine and put it in on a 5.3L engine? do we need to flash/ reprogram? 2006 4.8L trany on a 2000 5.3L Silverado extended cab
You are a great teacher
Thanks! Lots of useful information and easy to understand ..😊
That was a great class thank you.
Great explanation ❤❤❤❤
much grateful for your class
I wish you were my A/T trans lecturer!
The fluid in the torque converter...what keeps it flowing? Why doesn't the fluid get slung to the outer most part (the metal doughnut)
Good day is a cvt trans converter is d same as a non cvt one for same type of vehicle but differnt model tnks
Could a torque converter lock up and make the engine seem to be locked?
I have a 99 Ford F-350 pickup with a 7.3 diesel engine it is 4x4 as well.
The pickup Sat for about 5 years.
WE tried starting it but the engine seems to be stuck. It doesn’t make any sense so I’m wondering if the TC could be the problem.
Your thoughts?
Thank you..Very Nice explanation ❤
In ideal condition when lock up is engaged input shaft rpm should be equal to engine rpm?
hello,sir,im struggling with my bmw e60 525d torque converter.Imagine you are cruising with speed of 100km/h and the car just shaking due to rpm changes.Is it possible torque converter clutch is slipping and causing these symptoms?
This is a nice video, thanks 😊
Good day is a cvt trans converter is d same inside as a non cvt type tnks
Why doesn't the fluid inside the torque converter get flung to the inside diameter of the big metal doughnut and stay there?
Thank you. God bless you
Trying to understand why my transmission is slipping at low speed only. Still not clear
Great video!
Tell me again about how it's normally welded together. 😊
Great education thanks a lot.
What is your advise about gearing down with one of these new types of torque convertors? Advise on the internet seems to be that we should use the breaks to slow down in an automatic, but some people still say it is fine to slow down using the gears?
Do you mean like manually shifting to lower gears for engine braking? I don’t think the converter really minds that. Many vehicles have tap shifters to allow you to control the gear you’re in, so it’s not unexpected or uncommon to have the converter drive the engine during braking.
@@siuautomotive when coming to a red light in my automatic, is it "safe"(aka not weardown parts unnecessarily) to take my feet of gas and only apply brakes when the car has slowed down and im getting close to the red light.
eg: while going 50mph, when im about to approach a red light, id take my feet of the gas when i'm at 50yards away from the red light and apply the brakes in the last 10yards. does this practice wears down my car parts faster?
Aye friend I recently swapped the engine on my sisters 04 scion and wen I put the bolts into the torque converter was a little tight well I left it like that started the car drove it for a couple blocks i had to floor it so it can move at a stop and after that didn't wanna move forward or reverse what can it be?
How the turbine side engages and disengages to input shaft at idle?
I’m not sure I understand the question. The turbine is splined to the input shaft. It’s always connected.
Clutch is in dis/action
Great insight
If the stater is freewheeling due to one-way clutch failure, wouldn't the "stall speed" be too high?
That’s a common assumption, but the stator, when locked during torque multiplication, redirects the fluid in the same direction as engine rotation. That extra “push” is what allows the engine speed to climb higher. If the stator always freewheeled, it would never get that extra push.
@@siuautomotive Yes, makes perfect sense! Not sure why I had that backwards but thanks for confirming.
Front engine,, rear wheel drive..
Fluid is forced in the impeller centrifugallyfrom the interior of the impeller to the exterior of the impeller.
Fluid traverses into the front of the vehicle, into the direction of the engine/crankshaft, away from the brake lights.
The fluid runs into the turbine at the exterior of the turbine down into the interior of the turbine.
The fluid Traverses towards the rear of the vehicle, away from the engine,
The fluid is now moving to the stator.
The stator brings the fluid towards the interior of the impeller completing the toroidal flow of the viscous fluid, transmission oil.
Thank you very much!!!!!!!!!!!!!
Hi sir.thes may loader tcm 50b michigan clark transmission problem
Does the clutch engage strictly by fluid pressure, based upon the specific engine RPM? Or is it electronically controlled by redirection of fluid to special port (s) that pressurizes the clutch?
The engine computer uses a solenoid inside the transmission to send fluid pressure back into the converter input shaft to lockup the clutch.
I would be glad if you could answer the following question: going down a very steep slope with a 4x4, in first gear (let's suppose it has a TH400), to obtain the maximum level of engine braking, does the torque converter stator rotate way faster than the engine (due to its one-way clutch and to the way the ATF touches its blades) or does the torque converter stator rotate at roughly the same speed of the engine? I mean: engine speed 3,000 rpm, torque converter stator speed 6,000 rpm, is it possible?
The stator is splined to the case and rotates at the engine rpm unless the stator is free spinning. In your scenario, the wheel rpm is kept low with low gear ratio to use engine braking. Assuming a steep downhill, you are probably reaching the “stall speed” of the engine, or 3000 rpm in your example. But your wheel speed and therefore your turbine speed is well below the impeller speed. The one way clutch of the stator will be engaged and the stator will not free spin and rotate at the impeller speed.
The only time the stator speed will exceed the impeller speed is during the rotary phase when the turbine has come up to speed. This is when the ATF might hit the back of the stator blades to allow free spin of the one way clutch where stator spin will exceed the impeller speed.
My stator gear rotated clock wise and counter clock wise.....is this normal. My car made weird noises in reverse and drive, leaked really bad when in park, and had very bad acceleration.
Thanks for the video.
When you try to move the stator with your fingers or a stator support in your hand, it will rotate in both directions since you are holding onto the inner race. You should feel the one-way clutch slip in one direction and grab the stator in the other direction. It could be the source of poor acceleration, but it shouldn’t cause a leak unless the converter internals are coming apart and it tore up the hub or seal.
@@siuautomotive the inner gear” behind the stator is moving around” which explains why the torc converter was hard to get on.
When I pulled the engine, the seal was in good shape, the leak was coming from under the bell housing.....I took it as a bad seal but there was no indication it was worn out.
If I had a tool.... a Could’ve did a pressure check, I’m gonna replace the torc converter for a peace of mind.....thank you for the speedy reply.
@@siuautomotive ok did another test and the stator was fine....the old seal might’ve been worn....I never really checked it out before replacing.
TC has 3 connections to the AT side. 1st is the pump driving tube sticking out from TC case(often with 2 notches or 2 tabs at its end),which match to 2 tongues or 2 tabs on the pump rotor in the front of the AT. 2nd is the bigger female spline in the TC stator one way clutch hub, which meshes with stator tube male splines from the back cover of the AT pump(motionless with AT case). 3d is the small female spline in the center of TC turbine, which drives the male spline on the end of the input shaft that sticking out from the AT.
How does oil gets into the torque converter? is it through the input shaft?
Yes, in tcc release mode it travels through the tip of the input shaft to feed the converter. In tcc apply mode, it enters between the input shaft and stator support shaft
god bless you thanks
can I replace A231 250 05 02 with A222 250 05 02 torque converter
Would I be able to put a torque converter with a lock up clutch in a 1965 2-speed Powerglide?
I don't think so, because there are no oil circuits or solenoids to control the fluid for the powerglide. But who knows (not I), someone might make a kit.
Thank you
Just had the one way roller bearing go out after camming and tuning my engine and yeah, my stall speed was only 1000 rpm.
That's a bummer! Probably a little slower off the line, lol!
@@siuautomotive And a lot of rattling and squealing! It sent metal chunks from the springs in the one way roller bearing throughout the transmission so I ended up taking it apart and cleaning everything while I had it out to put in a new torque converter. I had just rebuilt the transmission a few months ago so taking it apart again was a breeze.
Very educational video!!! thanks.... I work at exedy... :)
Cool! I'm putting together at transmission with Exedy frictions as we speak!
Who invented the torque converter?
According to LuK, the torque converter was invented in 1905 in Stettin, Germany, by Dr. Hermann Föttinger of the Vulcan Ship Yards, the torque converter was originally a
steam turbine drive for a ship propeller. www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/symposia_1/downloads_11/01_Torque_converters.pdf
Good day everyone.
Am currently in my 400 level (Automotive Engineering) but am still finding it difficult to understand Automatic transmission.
Please any guide from an expert?
Someone I can be communicating with anytime am lost and guide me through.
Thanks to SIU😍😍😍
Greath!
Converters are TRANSMISSION COMPONENTS and are INTEGRAL to the transmission and one is useless without the other.
A converter is not to an automatic - or powershift - transmission what a clutch is to a manual. A manual can "work" without a clutch. A clutch can be used to 'limp home" a manual trans not completely "blown".
"Building" an auto without replacing the converter AND "external" components like coolers may be a "build" but it is not a "rebuild:.
There's no solid connection, there is a fluid connection
There is a fluid coupling
Illinois
God you drone on forever
Hello! any idea where this sound come from? ua-cam.com/video/WTbE2AYhhf8/v-deo.html The transmission has been rebuilt, torque converter as well. there was no such sound before. Thanks!
please put subtitles in portuguese
Maybe you could convert a transmission into a pressure cooker? If you take out the guts. Not really.
My car is slip
Omg
Can a bad torque converter stop a car from moving forward and reverse?