Quote:
Originally Posted by Poppyboy
I spoke with someone at ZF a couple of years ago about the "lifetime" aspect if the fluid. He said that is only some "agreement" between ZF and BMW. He concurred that it should be periodically changed, but couldn't provide a recommended interval.
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When your driving put it in N and see if the sound is still there ... I'm dealing with a similar thing on the 335, I'll be going under the car to check oil level which is a pain to check, has to be between 85 and 95 degs and car running, open fill plug it should only drip a thin film ...