My car (e92 323i N52 and GM Gearbox) has been plagued with a weird issue for a while now. It happens mostly at low gears which I would assume gear 1 shifting to 2 at around 3000rpm. My usual experience would be, the car would move till it reaches what i mentioned above and the gearbox will have this problem it feels like it could not lock into the next gear. The moment this happens, rev needle keeps fluctuating around 3k rpm till it catches on the next gear.. However it’s worth to note that this usually happens only when i accelerate after going through a bump or after a hard break. It also occured randomly when coming out of junctions which is pretty dangerous as the car would just remain ‘powerless/hunting for the right gear’ for a few seconds. I have taken a video to explain and u can actually hear how the engine/drivetrain and rev needle reacts. This was taken when i accelerated after crossing a small bump.
Ive sent it to zf auto penang but there were no codes. Cleaned my vanos but doesnt seem to work. Gearbox oil checked out okay. They told me that it would be better to change a gearbox as it would be difficult to figure out whats wrong as there were no codes. Unlike the zf gearboxes, i am not experiencing any hard shifts/shudders when coming to a stop. Hopefully someone can guide me in the right direction. Here is the link to the vid: https://youtu.be/iSHp6aMPGsQ
Edited by vinxter, 12 March 2018 - 09:37 AM.