Transmission Questions? Ask a Mechanic for Answers ASAP
can you tell me how much torque has been increased by? - is it possible to revert the car back to standard to see if this helps your issue?
also do you know what fluid type is in the gearbox at the moment? and can you tell me if the fluid level was checked with it warm? as the level needs to be set with the fluid at 50 degrees C
as a 1st thing to check is what type of fluid has been used and was the level checked with the fluid warm?
as my 1st reaction is that either its the wrong fluid or there's not enough fluid in it
as if its the ZF 6HP unit then it needs Shell M1375,4 fluid BMW PN 83 220 142 516
whereas the GM transmission uses Dexron IV
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