The gear selector seems to be stuck in P, but if I put a little bit of force I can get it out from P to D, however when I do this I can hear under the car noise from the transmission. Because of that like 200 kilometers ago I changed the oil in the transmission(ZF 5 HP 19) along with the filter, magnets and the bolts. It was pretty dirty the oil and it was looking that it needed to be replaced. I does not do it all the time no matter cold, hot but seems lately is doing more frequently and is an unpleasant. When I switch from other gears to park it goes very fine, the gears are smooth except the second gear it hesitate a little before the third gear, I can see in the RPMs of the car how it wants to shift but is delaying the shifting with about 1-2 seconds, however is pretty smooth. This is happening only <2000 RPMs if I accelerate after 2000> RPMs all the gears go smooth. I changed the oil DIY by myself if that matters with original ZF parts.

Other information that I know, I did check the transmission with ISTA tester/software to see if it has the same VIN as the car, and yes is the original gearbox acording to the tranmission computer. 235000 kms on clock. No errors/fault codes on the engine or tranmission.

I suspect the selenoids, the cable, the interlock shifter(it has some glue on some plastic parts), and lastly probably something is failing in the tranmission itself. Also I suspect the previous owner put some additives in gearbox to hide the fact that the tranmission has issues. The car had 1 owner, however I bought it from a dealer some time ago.

Where should I start to investigate?

  • Check the level... but you did that.
    – Solar Mike
    Mar 21, 2021 at 16:47
  • @SolarMike, the level is right, I did follow ZF tutorial specifically for this gearbox, which can be found on YT.
    – John
    Mar 21, 2021 at 16:53
  • Welcome to Motor Vehicle Maintenance & Repair! Does this happen when facing up/down hill? Mar 21, 2021 at 17:34
  • @Pᴀᴜʟsᴛᴇʀ2 ,thank you! Yes I do park my car a little bit with the front of the car uphill, but it does this even at gas stations, or anywhere where the ground is flat.
    – John
    Mar 21, 2021 at 17:42


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