6-speed Issues

On my '05 330ci shifting engagement is notchy shifting into gear, almost like things aren't exactly sync'ed up. The car only has 35k miles and up until several weeks ago shifted very smooth. Suggestions? Change gear oil? Better gear oil? Thanks.

hello, just signed on here and it would appear we have the same issue. My current thought is that it's the gear selector linkage bushings. I am thinking about replacing the selector with UUC's double shear selector.

I used Royal Purple Syncromax and it seems to work pretty well. I'm sure there is better but can run to Auto Zone to get another if I ever spill a bottle on my garage floor...unlike Redline. I change my gearbox oil 1x a year and gear engagement is always great.

I do have the UUC SSK and DSSR which REALLY tightens it up. Some won't like it since it will be a little notchy.

I use the redline ATF/75W140 mix since I've upgraded to the UUC flywheel and clutch

Originally Posted by Crazy8

On my '05 330ci shifting engagement is notchy shifting into gear, almost like things aren't exactly sync'ed up. The car only has 35k miles and up until several weeks ago shifted very smooth. Suggestions? Change gear oil? Better gear oil? Thanks.

35k is right about where my stock fill gave up too. Fresh oil should cure this problem. With Royal Purple, I've noticed I need to change about every 10k but it is more readily available than the OE fluid.