Transmission Concern
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 34
Likes: 3
W204 C63 AMG
Transmission Concern
I recently did my own transmission flush along with a new trans filter and then a relearn using the gas pedal method.
now when I go around turns, even after fluid is warm. My 2-3 shift in comfort mode bogs so bad it feels like the brakes locked up. same for 1-2 in sport mode
when in a straight away my upshifts feel like I slam the brakes between shifts really hard then it goes.
am I missing something here? Did I mess up? I did everything I found on DIY flushes. Did I not relearn driving properly?
now when I go around turns, even after fluid is warm. My 2-3 shift in comfort mode bogs so bad it feels like the brakes locked up. same for 1-2 in sport mode
when in a straight away my upshifts feel like I slam the brakes between shifts really hard then it goes.
am I missing something here? Did I mess up? I did everything I found on DIY flushes. Did I not relearn driving properly?
Senior Member
Joined: Apr 2017
Posts: 367
Likes: 34
14 polar white E550
The fluid level might not be correct , needs to be measured with a laser at a certain temperature . But I’m having issues as well , not the same as yours but a certain different kind of issues that I’ve been dealing with for about a year now ( MCT )
Newbie
Joined: Nov 2018
Posts: 3
Likes: 0
610 hp Evo X, soon to be c63 AMG
Care to shed some light on your problems?
Senior Member
Joined: Apr 2017
Posts: 367
Likes: 34
14 polar white E550
Alright so my fluid was changed at the interval it calls for at Mercedes , the car is tuned and has stock airboxes. The problem im having is ( flaring ) between shifts most pronounced in Comfort mode . The rpm will jump up and down very slightly before settling in the gear . There are no codes stored in the tcu also don't have this happening in Manual mode at all , it seems to happen more worse in lower rpms . Best I could describe it !
Super Member
Joined: Oct 2014
Posts: 701
Likes: 103
From: Ontario, Canada
2009 C63 AMG, 2010 C250 4Matic Sport
Not sure what model year your C63 is, but it sounds like the TQ lockup clutch is having some issues engaging/disengaging that it hadn't had previously. Could be a fluid level problem like mentioned
Senior Member
Joined: Apr 2017
Posts: 367
Likes: 34
14 polar white E550
Yea I was thinking it is the lock up clutch having issues , but I was not convinced its a fluid level problem because I had checked the car last week at running temp and the fluid came out in a steady stream when I removed the drain plug. Anyone know how to adapt the lock up clutch via star ?
