Originally Posted by rldzhao
^again, the SAF-XJ fluid is the DEFAULT BMW APPROVED fluid for M3's differential (see attached). NOT ALL CARS get the diff noise using the SAF-XJ fluid.
For example, my DCT never made noise with SAF-XJ, but my 6MT did.
this noise you guys talk about how loud is it and what does it sound like? my car sounds like something rubbing in the diff and its not quiet its REALLY loud bmw have tryed this fm booster and said we will change the oil again.
my first diff wasnt locking so they changed it and they never changed the diff oil like they do at 2000kms do you think this could be why its loud?