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Rear Diff Groan by the numbers
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01-03-2017, 07:25 PM
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77Z28
Drives: 2016 2SS A8, NPP, Mag ride
Join Date: Jun 2016
Location: Ohio
Posts: 91
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I have the groan and I took it to the dealer. The dealer talked to GM and they were told the groan was normal. I do not believe it is normal.
77Z28
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