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      10-20-2014, 08:23 AM   #3
Joey911
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Drives: 2011 E92 335i MT w/ M Sport
Join Date: Sep 2014
Location: MA

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Quote:
Originally Posted by CrustyNoodle View Post
I can't offer any solutions but I'm very interested to hear what you find. I also have a Wavetrac and "the thump". I'm not entirely sure it is the Wavetrac but I have my suspicions.
If you can afford the time, you could put the old diff back in and see if the clunk disappears - that would definitely indicate that the issue is inside the diff not outside (driveshafts or bushes etc.)
I actually did put in the old diff twice. I wasn't aware if the THUMP was there from the beginning probably because it was very soft.

Both the first and second time when I put the Original Diff back on, the can notice a THUMP but very soft (you become sensitive for that THUMP after a loud one)

It has to be somewhere on the rear drivetrain section, but present less with open diff... less stress?
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