Quote:
Originally Posted by Edmund1812
From what I have read there are 3 separate compartments in the BMW M Differential.
The Center compartment is the Ring and Pinion gears. The outer ones are the Clutch packs. They use different oil.
At 1200 miles, on M Comp, the Center compartment is the only one changed.
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The F85 X5M had that oddball three oil chamber rear differential which used two different fluids. The F95 X5M just uses one type of differential fluid like most differentials.