Originally Posted by Mel Red
Greg, I got the same noise, right after the dealership changed the diff fluids.. Good to hear it's not just my car. I almost lost my mind, I've only had my M3 since the 4th July and now it's falling apart, WTH! The Service Manager told me that he received a new service bulletin instructing him to use a special type of diff fluid and the noise should stop within 300 to 400 miles after the change. I'll keep you posted!
As I noted, my noise stopped immediately after the change to the updated fluid.