Mercedes Benz W202 C280 Transmission 722.424 Teardown
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- čas přidán 1. 05. 2017
- Tear-down of my transmission that has a failed reverse, reverse friction plates are gone completely, reverse piston spring retainer ring has exploded into pieces.
The video is a bit chaotic, it's my first time taking a transmission apart...THIS IS NOT A "HOW TO...." video, merely just a record for myself.
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Разборка трансмисии 722.424. Полетела задняя передача.
Это не лучшее видео по разборке трансмисси, тк это мой первый эксперемент по разборке. - Auta a dopravní prostředky
Rebuilding a 722.435 at the moment, and this video is a lifesaver.
Thank you for being so specific about what you’re doing. Great video.
This video is very helpful for the old Mercedes Benz Owner like me, thank you Andy !.
The complexity of the inner workings of this automatic transmission are just mind blowing. The specialists engineers who rebuild these things must know there stuff..wow
Actually the mechanical part is quite simple, only 3 major components - planetaries, clutches and a sprag clutch.
Hydraulic part is a bit more complicated, only because detailed design information that would explain designation of every passage is not available.
I guess newer 7 and 9 speed transmissions are more intricate, but this 1995 4 speed transmission is straight forward.
I think all this mistery behind the transmission repair is overrated, and we are being overcharged for these repairs.
My cost of all replacement parts is about 280CAD, most of them had to be original MB parts.
The transmission rebuild is nothing more then a complete cleaning, replacement of all seals and failed parts and maybe adjusting hyd pressures on assembled vechicle.
I don't want to sound like i know everything, after all this is my first time taking one apart. I just wanted to see what will it take to rebuild a transmission.
Im still waiting for parts, will see how the rebuild will go.
Watching this video makes me glad, that I drive the manual gearbox version of the w202.
Пока я добавлю перевод смотрите это видео, успеха.... czcams.com/video/c5iQ8ov7nuc/video.html
Hi Andy, good video, in conclusion what was the fail on the transmission, a ring o a piece of plastic broke. Thx for share your work.
the root cause of the failure was the raptured small seal on the reverse clutch piston.
when i got the car i did feel that reverse engagements were lazy, it would take 1-1.5 sec to engage. So i guess the reverse clutch was slipping a bit, cause there's no friction material left on the plates. The reverse piston is held in place by a flat ring thru about 18 springs that act as return springs. As the friction material wear out the reverse piston travelled further toward the flat ring until it came in hard contact.
So the flat ring broke into 4 pieces.
Давай по-русски говори
Мое предположение.....
Основной причиной выхода из строя трансмиссии была внутренняя резиновая манжета на поршне включающим муфту задней передачи. Толи износилась, то ли порвалась. На манжете я нашел отсутствующий кусок, сейчас не могу сказать точно оторвался он в самом начале или уже после того как расорвало плоское кольцо.
Когда я купил автомобиль, я действительно чувствовал, что включения задней передачи были ленивы, занимало где-то 1-1,5 секунды. Таким образом, я думаю, что задняя муфта проскальзовала, потому что на пластинах практически не осталось фрикционного материала. Обратный поршень удерживается на валу плоским кольцом через около 18 возвратных пружин, само плоское кольцо стопорится на валу круглым кольцом. Когда фрикционы износились, обратный поршень стал выдвигаться ближе к плоскому кольцу, пока он не дошел в жесткий контакт. Теперь поршень давил на плоское кольцо а не на фрикционы. Плоское кольцо стало давить на круглое кольцо с большей силой, возникшее радиальное напряжение разорвало плоское кольцо на 4 части.
Great job and very useful information! Now is there anyway to prevent this happening? Also what did it fall off when you removed the front pump? For changing the big O ring for the pump the job is straight,just remove pump and unbolt it from behind?
@@mihu202 Is there anyway to prevent this? i dont know, i've seen few videos with same problem, the part made from aluminum just broke into pieces. When i pulled out the pump the pieces of the disintegrated ring fell out. changing the o-ring is pretty straight forward, just keep the transmission upright and shouldn't have any problems, Pay attention to 2 sealing ring on the shaft in grooves.
@@AndyPMercedesBenzChannel Got it,ill take it apart this coming week.Now after doing some diggings ive read that in order to prolong the life of reverse clutches the trick is to use only half of the springs inside the piston,that way when engage R it won’t let it slip and it will feel a bit more harsh when R is engaged.The very first 722.3 trans had softer springs but no premature wear of the reverse clutches however due to a harsher engagement clients complain and they start using stronger springs which eventually affects premature clutch wear.
Nice video man thank you for shearing the info I got a 95 C220 and is shifting hard 2 and 3 bat a very good transmission over all
any help on the shifting problem ? Thank you so much for your video
Thanks. Im not an expert in these transmissions ...yet...But from what i've learned...modulating pressure is responsible for how the transmission shifts, the modulating pressure is adjustable and also you can put a pressure gauge to measure it. Also there are shift kits available on-line, these are a collections of different strength springs that could be installed in the valve body.
I still have publish the valve body rebuild video, probably will be in a month or so.
Theres lots of info online about this issue, i think your transmission is 722.423 W4A020.
Thank you have a bless day
👍👍👍
Здравствуйте,у меня Мерседес С280,1995 года,проблемы с задней передачей,буксует,если включается едит на ровной поверхности,менять или делать ремонт в сервисе нет средств,хочу сам снять,можно перевод,спасибо
Hello Andy
I am watching your video on the transmission tear down , at the 28minute 13 second mark you are removing a connector with a crescent wrench,can you tell me what that is?
Thx
Lawrence
Hi Lawrence, That's Transmission Overload protection switch.
Thanks for that information, I have looked it up now that I know what it is, not sure how critical it is according to some not very. What is your take, reason I ask is that the one on my tranny has two wires that look like they are about to come off.
@@AndyPMercedesBenzChannel
@@Loco327654 id say if you drive like an old man it shoyld be ok.
Thanks for the reply, not that I drive like an old man but where I live if you can find a stretch of pavement where you can get up to 80 Kms/h you are fortunate, it is that I occaisionally have to deal with hills with very steep grades. Tends to work the hell out of the tranny...@@AndyPMercedesBenzChannel
"Долго еще"... "уууууу...."
czcams.com/video/eGEWNVL5pYA/video.html идем сюда, и ждем здесь. скоро будет здесь на русском
I will never buy another car with a automatic transmission .I love the standard shift .I have a 90 560 SEL parked for a year and now reverse does not work properly it takes a while to kick in judders and then when it kicks in it pulls good ,it just takes a while to get reverse to engage .any clues ? Help
Maybe its time for ATF change. Also rubber seals tend to get hard and brittle with age, maybe it's time for a rebuild. I'd check the working pressure to make sure the pump is working properly .
Первый раз разбирая коробки
Hello, I have a question. My car is 1998 W202 C180 automatic transmission. When I start to drive the car the first and second gears don't change quickly. I should wait long for the changing of gears. After changing the gears it gets normal. I changed the oil because of it but the problem with gears weren't solved. What problem could it be?
is this on the cold engine when you first start
yes it is
MB has a valve that delays the upshift from 2 gear to the 3 when the engine is cold. when you start the car let it worm up to 60 deg and then drive
ok, i did this way, but again the gear changed late
so, does it operate same way on hot engine?
Is it the same gearbox that come on m112 engines ??
I dont think so, these hydraulic transmission were used up until about 1996, after that MB used 722.5XX transmissions with TCM.
На этой акпп 722.424 с боку где стоит вакуумный регулятор есть колодка проводов за что она отвечает можете подсказать?
Насколько я помню это указатель нейтрального положения
👌
Появился вой в акпп 104 двиг переключения норм при прогреве вой уменьшается подскажите
Гидротрансформатор? Наверное
Hello
I have a Mercedes C280 SPORT year 94 engine 6 cc and I have recently discovered that this is mixing water in the engine oil and probably the head gasket has chelated the gasket, I wanted to hear from you, what is the value of a new head in your Country, and I will be able to Export to Brazil where I live.
Thank you
Flávio Pereira
why do u need a new head? replace the head gasket with machining of the head. u dont need a new head unless u overheated the engine
Hello
The problem that the head was not found that burned the joint and the information I have is that if we take out we will have to do the rectifying to glide the head and may not be good to use again.
I ask for the value, because here in Brazil imported car parts and extremely expensive spare parts.
What is the value of a new head in your country, in dollars?
Thank you!!!
Flávio Pereira
well. i dont see any cylinder heads for sale.
machining the cylinder head is a usual procedure, unless you have done it already few times before.
what you have to do is pull the head off, take it apart, clean the block and cylinder head, lap the valves, clean hydraulic lifters, change valve stem seals and put it all back together.
Flávio Pereira
i dont know how much a new cylinder head costs at the dealership. i think it will be same in Brazil.
canada and usa has same prices.
I seem to be sucking transmission fluid into my engine and coming out of as smoke. What system can that be?.
I have a 2.6 190e with a 722.4 transmission
@@Jhelm I don't know if what you describe is possible, transmission fluid can mix with coolant if your rad failed. But you also need a failed head gasket for that
@@AndyPMercedesBenzChannel I found the problem, it was the automatic transmission vacuum modulator. The diaphragm was torn.
@Jhelm thanks for the info. I never seen this one. Your transmission was shifting pretty harsh probably because of this
🙋🙋
На 5:50 про этот разъём я говорю
Навечки
Хотелось бы на русском послушать
Я бы посоветовал поискать на Ютюбе. Я помню что находил видео на русском языке которые сделаны намного лучше моего и сделаны профессионалами которые разбирают не первый раз.
31min you are speaking what now we can't hear yo language
It's nothing important, there's a complete rebuild video of this transmission on my channel, look for it.
This was just a quick tear down