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Showing results for tags 'drivetrain wheelbearing'.
Hi all, I purchased a 2002 C4S tiptronic at the start of the year and I have noticed that there is a whirling type of noise when I drive it which is most noticible at around 25-30 MPH. Now you need to be tuned into it to realise it's there but now that I have I can't hear anything else. I have changd the oil on the front and rear differentials to see if that made any difference as I read some threads about the front diff being not the strongest, but I don't think it has made any difference. The front diff's oil was clear which may suggest that it has recently been replaced, the rear differen