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Strange noise from the right rear end?

Discussion in 'E36 M3 (1995-1999)' started by Cfletch13, Sep 24, 2012.

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    Cfletch13

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    One morning as i was getting on the freeway everything was fine but once i hit 5th gear and about 65 mph the right rear end started to make a strange clunking type of noise. i immediately got off of the freeway and pulled over. Wasnt sure what was up i slowly got it back home and the noise was constant anywhere above say 20mph. the sound goes along with the speed (slower i go slower it clunks fast i go the faster it clunks) so that very day i took it over to the shop and asked them what it could be. I was thinking a CV joint because my car is at 230k. The next day the shop rings up and he said there was metal in the bottom of the diff and he thinks i broke a tooth off somewhere in the diff. I took it home today and under power i did not hear the noise but if i am just cruising then i will hear it. Again the sound is coming the right rear. I am going to get a 2nd diagnosis but i want to hear what you all think this could be. Thank you
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    Cfletch13

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    It is a 1995 m3^
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    • Technical Service Advisor

    charlson89

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    This is hard to really give you correct diag since I haven't heard the problem myself. Drive line noises are hard to diag since they can be transfered through the driveshaft, trans and engine. Best thing is to get it up on a hoist and see if you can duplicate the noise and listen to the transmission and diff to see if any one is really loud. Common things I see that are mistaken for transmissions and diffs is wheel bearing, center driveshaft bearings, guibo. Of course it may still be a diff or even a transmission Do you only hear it in fifth gear? While turning either direction? With the clutch in or out?

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