Transmission bangs when shifting (Morning only)

Discussion in 'Engine' started by turboGT, Jul 22, 2015.

  1. turboGT

    turboGT Active Member

    Messages:
    87
    Joined:
    Mar 20, 2014
    Car:
    Mercedes only!
    Good evening,

    I have a S500 (W220) and since I bought it, the car jolts when coming to a stop. This occurs only in the morning. Once the car is warmed up, the transmission is very smooth.

    From "jolts", I mean that the transmission bangs when shifting.

    So, I changed the fluid, filter, pan, magnets and adjusted the fluid level. I had a look at the transmission pan and there were no metal particles. So, I guess that there is nothing wearing out. Unfortunately, the transmission service did not solve the issue.

    After the fluid change, the transmission became worse! In the morning, the car jolts and hesitates when shifting from 1st to 2nd.

    I went back to the dealer and requested for a software update but was informed that my transmission is up to date. I also requested for a adaptation but nothing changed.

    I discovered something difficult to explain. I was away for one month and my sister drove the car while I was not in the country. She does not drive fast and was very gentle with the car. When I came back, I noticed that the transmission issues were gone! But after 3 days of me driving, the issues came back.

    From my point of view, the car is unable to adapt to my driving style.

    If anyone knows how I could possibly fix this issue, please let me know.

    Thanks a lot :thumb:
     
  2. jazzyglobe

    jazzyglobe Active Member

    Messages:
    161
    Joined:
    Apr 4, 2013
    Car:
    W211 E320
  3. jazzyglobe

    jazzyglobe Active Member

    Messages:
    161
    Joined:
    Apr 4, 2013
    Car:
    W211 E320
  4. OP
    OP
    turboGT

    turboGT Active Member

    Messages:
    87
    Joined:
    Mar 20, 2014
    Car:
    Mercedes only!
    I had a deep look online and found out the possible cause might be damaged solenoids.

    I am tempted to replace the Torque Converter lock up solenoid and see if it solves the issue.

    From what I am aware, the 722.9 transmission has 8 solenoids.

    I am a bit confused about part numbers. Does the TC lock up solenoid has the same part number as the shifts solenoids?

    I know this question is very technical but I would appreciate to get some help.

    Thanks a lot:thumb:
     

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