Just bought a 2012 Elantra AT with 237k on it. Owners manual states transmission fluid change( drain and refill) at 240k. To do or not to do? I have no real service history of this car.

Transmission right now is okayish. Kinda clunky going from park to drive sometimes, which has gotten better since I changed my oil last week. It kind of lags while going through the gear selector too, most noticeably on park. If I switch to park and let go of the brake too quickly car starts rolling backing for a second and then locks into park.

Any advice?

  • -NOT_A_MECHANIC-@alien.topBEnglish
    1·
    10 months ago

    Clunky from P>D could be worn mount(s). The rolling into park is normal for any automatic, the pawl doesn’t have enough teeth to work with for no movement into engagement. If you’re parking on an incline/decline, gently brake while still rolling into the pawl to prevent undue damage, then engage parking brake.

    • sinbadXD@alien.topOPBEnglish
      1·
      10 months ago

      Thanks for the advice! I had a suspicion the mounts are wearing. I’ve been feeling a bit of vibration at idle so I knew the engine mounts were wearing but this explains why trans and engine mounts come in a set.

  • taschnewitz@alien.topBEnglish
    1·
    10 months ago

    Yes do a drain and refill with OE-specified fluid and replace the filter. Be careful to remove the seal for the old filter.

    Try to measure how much fluid comes out so you have a better idea of how much to put back in.