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What are the options to have the rear diff "upgraded"? I feel like the M has slight hesitation when letting off the throttle, or getting on the throttle fully as well as a slight "bump" noise from the rear.
Is that something that you heard/felt before your M went out?
M3 E90 DCT
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M3.E90 JZB Coded.GTSDCT.BomizValved.TurnerTestPipes.ResDelete .EurochargedTune.AAFilter.HRER40s
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