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Discussion Starter #1
I've got a C36 AMG with the 4 gear automatic transmission.

I'm not an expert in the Mercedes world ;-)

but when I see some pictures of the
C36 4 gears transmission
C43 5 gears transmission
E55 AMG 5 gears transmission

they look physically similar, and I did not see difference concerning the coupling with the engine

so my question is :
is it possible to fit a C43 or E55AMG gearbox on a C36

I assume the gearbox leveler + gearbox ECU need to be change too



thanks for your help
 

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44 Posts
Discussion Starter #2
I find a good link :

722.6 ZF transmission application


so the c36 5 gears use the 722.629 gearbox


it sames the same gearbox as for the E420 W210

but bell housing is different

in my mind, changing bellhousing is not possible cause not possible
but I find a post on this forum, and the guy tell it is possible

I think I'm not the first one who want to change the old 4 gears tranny for a modern one ...?
 

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98c230 & 98c43
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511 Posts
Why would you want the 722.631? It's prone to failure easily after 60,000 miles, and is not anywhere close to what one would call bulletproof. your c36 4-speed on the other hand is a different story.
 

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Discussion Starter #4
in fact if I find the housing converter from the 722.629 (C36 5 gears)
I can fit any 722.6 gearbox

like an E50 or E55 AMG


why I like to change :

have a gearbox more modern
I do not like the actual with is not autoadaptative
when I drive, I can quick down it take 2 secs or more
and if after that I depress a little the accelerator, tranny take the upper gear
I dislike it
it's not sportly ;-)

so for arround 1500$ : gearbox 5 gear + shifter + ECU, I can change everything

the 722.6 problem is an oil problem with bad gasket
you can fix the problem ;-)
 

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1997 C36
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24 Posts
Don't do it. 1997 C36 went to 5 gears and adaptive tranny and I just spent $5,000 on a new one after only 130,000mi. (which I guess is pretty good) but other mercedes I have owned lasted 200K+mi. The dealer wanted $7,300 by the way. I looked into putting a 1995 C36 AMG 4 gear tranny instead but then I was told I needed to change out the ECU and the Transmission computer too. Also, the Torque converter wasn't the same. Was cheaper just to replace with the OEM 5 Gear and hope to get to 100,000+ miles again.
 

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1995 C36 AMG, 1998 C43 AMG
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65 Posts
What! :eek:

Dude if your going to go to all the trouble of changing out the tranny/ecu/bellhousing etc... at LEAST make us all jealous and try and get one of the TIPTRONIC 5 speeds from the 00' C43! :thumbsup:
 

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Discussion Starter #7
I already find :

- the gear lever (I buy it)

the C36 5 gear gearbox (autotransmission sell it) so no bellhousing to change ... it's the good model

- I need to check to see if oil pipe are the same

- I find many ECU transmission not expensive (80-140$) it sames different versione are because you can have different differential ratio 3.07 3.27 ....

- I need to check for the transmission hardness (gear lever as not the same connector (4 gear or 5 gear)


can someone explain me how the autoadatative gearbox takes RPM and speed to change gear

connexion with ECU ??


the 4 gear transmission is mecanical with a wire on the throttle body to check acceleration

but with the 5 gear ?
 

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C36 AMG 1995
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37 Posts
Hello All

Stick with the 4 speed vacuum controlled gearbox, slightly less performatic than the 5 speed ecu controlled unit. (But alot alot stronger) Talk to merc specialist mechanics and they will tell you about the 5 speed box failure rate.

My four speed box C36 is on 176000 miles, trans fluid change every 30000 miles>
 

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1997 C36
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24 Posts
I was told by a specialist that I would need a new ECU programmed for only 4 gears and a new Transmission computer since the one in my 1997 5 speed is adaptive and the old 4 speeds are not. Way too expensive at one shot. Cheapest to get a rebuilt OEM 5 speed for another 100K+ and keep everything the same.
 

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96 C36, 87 Turbo'd 190E 2.3-16, 86 SC'd 190E 2.3-16, Brabus'd C32
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1,626 Posts
this would be the most pointless couple grand ever spent. The 4 speed is bulletproof, the 5 speed is not and its not more "sporty" If you are going to spend any money on the tranny at all, go 190E 16V 5 speed getrag manual tranny.
 
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