Diff Fluid Change In My E46 M3 After Installing A Diffsonline Differential

It's been 1,200 miles since I installed a rebuilt differential from Diffsonline in the my BMW M3 and according to their break-in instructions it's time to change the fluid. Second time I've had to replace the diff. The first diff from them was clunky from the start, but I also needed to replace the front diff mount, which I somehow left at home, and I drove from Florida to Louisiana to a friends house to do the work, so I thought maybe it was that. I also installed a new performance clutch at that time. Replaced the mount and still crazy clunky. This one is good though. Only clunks seem to be from elsewhere in the drivetrain, most likely the CVJ, or constant velocity joint at the back end of the driveshaft. I have a new one, but it didn't arrive in time to put it on when I did this swap, and needed to get the old diff sent in to get my core charge back within 15 days of receiving the new one.

[@siamiam]

:)

[@seanmiller8701]

Seemed to still drive just fine after the fluid change. Not that it should drive any different. At least now with the break in done I can really get on it again!!

[@_bakez_]

Did the new diff solve the issue?

[@seanmiller8701]

I swear YT never sends me notifications on comments!!...yes, this fixed the clunk, it still has the usual slightly clunky M diff but it is a thousand times better than what it was!!