Hi I have a 2010 Mercedes e class rwd. It hasn’t been stock in years but I’ve been running 255/35/19 front and 275/35/19 rear. I recently went to 235/40/19 front and 285/35/19 rear. I love the ride so much better but I think it gave me a few weird shifts or maybe I imagined it. I was wondering if this is a large enough size to mess up the transmission of the car if I continue to drive with this setup. The wheel widths are 8.5 front and 9.5 rear if that helps.

  • zipzoomramblafloon@alien.topBEnglish
    1·
    1 year ago

    Your transmission might be shifting weird because you’ve been beating on it.

    Check the transmission fluid, look and see if mkultra supports your TCU (doesn’t look like it), depending on the year and transmission there’s an issue where transmission fluid will start wicking up the transmission electronics connector and get into the TCU and cause issues there.

    Did you ever do a re-learn via xentry/das/whatever after changing the rear size?

    • LukeGuyWatcher@alien.topOPBEnglish
      1·
      1 year ago

      This only started once I put the larger tires on and it is very minimal. I’d probably be the only one to notice because I drive the car daily. The trans itself is pretty well maintained. I recently did a service on it. I have not done a relearn on it however is that required? I didn’t do it any of the other times I went up in size.