What are the first signs of differential wear?
What are the first signs of diff problems on a normal 535i (M30 auto) running the factory 3.91 open diff?
I seem to have a 'noise' down the back (really it is a light clunk) when the gearbox down-changes to second, as if there is some play being taken up back there. It might just be my centre bearing tho- and I am not really looking forward to pulling it all (exhaust, etc) out just to see.
Am hoping someone has found the reasons for these kind of noises before...
Many thanks in advance for any thoughts on the matter... Jeff perhaps you cna have a stab?
The car has done 180k miles. Have changed the diff oil regularly (does it need to be synthetic?) Last time I know Kriss and I used Castrol 85W/90 (I think).
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