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      08-04-2026, 04:34 PM   #1
srv2790
BMW Service Dept.
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Drives: Bimmerless Currently
Join Date: Apr 2008
Location: Indiana

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4.10 Diff Whine - How to Quiet

Has anyone had success with fluid additives during diff fluid service to reduce the insane whine that a 4.10 rear and can cause.

Between 2k and 3k rpms at most speeds over 45mph, I want to put a bullet in my skull. The whine is exacerbated by the stiff 95A diff bushings that turn my rear subframe into a tuning fork.
Appreciate 0