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      05-09-2012, 02:15 PM   #13
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bigjae1976's Avatar

Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Wichita, KS

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2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
Originally Posted by tibra1 View Post
I dont think ANY wetness or leaks around diff is normal..change the seals..most likely culprit
If you follow the guideline of refilling the diff until the fluid leaks out of the drain'll get a little bit of normal leakage. The amount should be very small and shouldn't amount to more than staining.

If the E9X design is like the E46...for those who go to the track, you'll be changing those seals everytime you climb under the car. If you see the design of the seal, there is a spring on the side of the opening for the output flange. That spring holds the seal against the flange which creates the seal. That spring is not super tight and won't prevent all seepage. It does prevent your diff fluid from pouring out.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red