Are 722.6 gearboxes interchangeable?
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Joined: Jan 2014
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From: Republic of Texas
'99 and '05 E55 AMG
Maybe but maybe not. Some 722.6 transmissions are for a small engine, others are for a large engine. Different numbers of friction discs and pressure plates in the clutch packs. If I was to throw in a 722.6 transmission from a 220 CDI into my E55, the transmission would slip the first time I hit full throttle. Vice versa, the smaller engine would not even begin to stress the transmission from an E55.
Purchase a copy of the ATSG 722.6 transmission service manual and all will be explained. There you will find the differences between a 722.632 and 722.618.
Purchase a copy of the ATSG 722.6 transmission service manual and all will be explained. There you will find the differences between a 722.632 and 722.618.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2011
Posts: 2,214
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2011 E63, 2013 CLS63
Maybe but maybe not. Some 722.6 transmissions are for a small engine, others are for a large engine. Different numbers of friction discs and pressure plates in the clutch packs. If I was to throw in a 722.6 transmission from a 220 CDI into my E55, the transmission would slip the first time I hit full throttle. Vice versa, the smaller engine would not even begin to stress the transmission from an E55.
Purchase a copy of the ATSG 722.6 transmission service manual and all will be explained. There you will find the differences between a 722.632 and 722.618.
Purchase a copy of the ATSG 722.6 transmission service manual and all will be explained. There you will find the differences between a 722.632 and 722.618.
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,966
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From: Republic of Texas
'99 and '05 E55 AMG
722.632 versus 722.618:
The "632" version has an extra "lined plate" and an extra "steel plate" versus the "618" in the K1 and K2 clutch packs plus the B1 brake pack. The K3 clutch packs are identical. In the K1 and K2 clutch packs there are five lined plates and four steel plates in the .632 versus four lined plates and three steel plates in the .618.
So...the "632" version should be less stressed than the "618" transmission that was originally in your car. The TCM (Transmission Control Module) is mated to your car so all should be good as Zayed posted above.
Let us know how it works out for you.
The "632" version has an extra "lined plate" and an extra "steel plate" versus the "618" in the K1 and K2 clutch packs plus the B1 brake pack. The K3 clutch packs are identical. In the K1 and K2 clutch packs there are five lined plates and four steel plates in the .632 versus four lined plates and three steel plates in the .618.
So...the "632" version should be less stressed than the "618" transmission that was originally in your car. The TCM (Transmission Control Module) is mated to your car so all should be good as Zayed posted above.
Let us know how it works out for you.
Last edited by bbirdwell; Sep 23, 2020 at 05:03 PM.
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Joined: Apr 2019
Posts: 91
Likes: 16
From: Vermont, USA
01 clk430, 05 e500 4matic
I don't doubt that it will plug in and drive the car. Looks to me like there are different ratios for a W5A 330, and W5A 580 versions of the 722.6. Wondering if this will affect drivability? (not properly using the engine's "powerband")
https://en.wikipedia.org/wiki/Merced...on#Gear_ratios
Just had a similar situation and ended up buying the same trans instead of using the mismatch that I had on hand
https://en.wikipedia.org/wiki/Merced...on#Gear_ratios
Just had a similar situation and ended up buying the same trans instead of using the mismatch that I had on hand
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MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,966
Likes: 1,315
From: Republic of Texas
'99 and '05 E55 AMG
I don't doubt that it will plug in and drive the car. Looks to me like there are different ratios for a W5A 330, and W5A 580 versions of the 722.6. Wondering if this will affect drivability? (not properly using the engine's "powerband")
https://en.wikipedia.org/wiki/Merced...on#Gear_ratios
Just had a similar situation and ended up buying the same trans instead of using the mismatch that I had on hand
https://en.wikipedia.org/wiki/Merced...on#Gear_ratios
Just had a similar situation and ended up buying the same trans instead of using the mismatch that I had on hand
From the ATSG manual:
S430 model year '01 used the 722.632.
E320 model years '96 and '97 used the722.605/629.
E320 model years '98 to '01 used the 722.607 with the exception of the 4 Matic which used the 722.664.
The 722.618 transmission was installed in the SLK320 model years '00 and '01. The manual does not show this installed in the E320 version. Perhaps erroneous info from the salvage yard or a previous transmission swap that was not documented?
The manual does not break down the transmission info by model for model years 2002 to 2004. So there is still some missing information that may or may not modify the above presented info.
Last edited by bbirdwell; Sep 25, 2020 at 11:36 AM.
Junior Member
Joined: Jun 2011
Posts: 53
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From: Crossville, TN
2006 CL55 AMG
I've always wondered this myself. My 99 E300 has 303k on it and always wondered what other, stronger transmissions, I could bolt in place from bigger powered cars. That way, in case I put on a bigger injection pump and turbo, I don't flat out destroy the stock transmission without a backup plan.
Thread Starter
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Joined: Mar 2011
Posts: 2,214
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2011 E63, 2013 CLS63
Hey guys,
I found out the transmission are not compatible for the above scenario however I have another scenario now.
I have an S500 that needs a transmission and I have an S430 transmission. The S430 is a 722.632 and the S500 is a 722.633. Technically speaking they're both M113 engine and the power bump up isn't significant. The question is, would the gear ratios be the same and therefore make the swap plug and play?
Thanks for any help
I found out the transmission are not compatible for the above scenario however I have another scenario now.
I have an S500 that needs a transmission and I have an S430 transmission. The S430 is a 722.632 and the S500 is a 722.633. Technically speaking they're both M113 engine and the power bump up isn't significant. The question is, would the gear ratios be the same and therefore make the swap plug and play?
Thanks for any help
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Joined: Aug 2021
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w211
you got that interior disassembly guide up yet? lol.. your woes made me laugh.. as i had the stupid roller blind fail in the up position.. rear headrests.. yeah.. dumbest design ever for something no one ever ever ever uses..
i am trying to find an unbroken cpillar to replace the ones i broke.. because i cant find your guide.
sorry for off topic.. i dont know a think about the gear boxes!1 cheers mate
i am trying to find an unbroken cpillar to replace the ones i broke.. because i cant find your guide.
sorry for off topic.. i dont know a think about the gear boxes!1 cheers mate
Thread Starter
MBWorld Fanatic!
Joined: Mar 2011
Posts: 2,214
Likes: 29
2011 E63, 2013 CLS63
you got that interior disassembly guide up yet? lol.. your woes made me laugh.. as i had the stupid roller blind fail in the up position.. rear headrests.. yeah.. dumbest design ever for something no one ever ever ever uses..
i am trying to find an unbroken cpillar to replace the ones i broke.. because i cant find your guide.
sorry for off topic.. i dont know a think about the gear boxes!1 cheers mate
i am trying to find an unbroken cpillar to replace the ones i broke.. because i cant find your guide.
sorry for off topic.. i dont know a think about the gear boxes!1 cheers mate
