Question about 722.631 5G transmission

Sep 16, 2011 | 11:42 PM

nathandimond

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2006 Volvo S40 T5 AWD 6spd

Question about 722.631 5G transmission

Hello, I have been researching for weeks trying to decide which Benz to buy. I narrowed it down to the C43, W202 C280, and W140 S420 or S500. I have decided not to buy the C43 due to the above average transmission failure I see mentioned so often. Had it not been for this issue, I would have no problem buying a C43. What I found interesting about this issue, and also confusing, is that the 722.631 transmission used in the C43 is also used in the late model W140 sedans; yet I don't see very many posts about transmission failure in this forum. So my questions are:

Is the transmission failure as common in the W140s as it is W202 C43 or is it more reliable and durable on the S-class? What's the difference?

Is this the same transmission found in a 2000MY C280? If not, does anyone know that specific tranny code?

Sep 17, 2011 | 06:48 AM

oldsinner111

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From: tennessee

s320

There were failures when factory said it was lubed for life.Then they changed their minds and changed fluid and filter.
This is all I have seen.

Sep 17, 2011 | 11:03 AM

nathandimond

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2006 Volvo S40 T5 AWD 6spd

So if the trans fluid hasn't been changed in 100k miles, how long can I expect it to last before it fails?

Would most W140 owners have known to have it serviced regularly?

Sep 17, 2011 | 12:29 PM

oldsinner111

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From: tennessee

s320

I saw problems on different forums at 120,000 to 160,000

Last edited by oldsinner111; Sep 17, 2011 at 01:42 PM.

Oct 24, 2011 | 01:30 AM

MOREN19241

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2000 S 500 MERCEDES BNZ

THEY ALL HAVE THE SAME 7.226 TRANSMISSION.THEY PRETTY MUCH EXPLODE INTERNALLY!!

Oct 24, 2011 | 10:07 PM

Benzonline

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From: Toronto, Canada

99 C43 ///AMG

Quote:

Originally Posted by oldsinner111

There were failures when factory said it was lubed for life.Then they changed their minds and changed fluid and filter.
This is all I have seen.

This is correct and I have both a C43 and a W140 with the 722.6. Its all about fluid, fluid, fluid. From what I hear the C43 does have a higher failure rate, but if you find one of these rare commodities, and it shifts perfect I wouldnt hesitate. FUN CAR!

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