Quote:
Originally Posted by USMUCL
Mine is a 2014 SS with 6M. Forgot to mention that.
I think what you experienced is not still an issue for my year. I think . . .
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You get the Redline with the FM in it . You will not need any addional FM . Just done mine . REDLINE SAE 75W90 API GL-5 HYPOID GEAR OIL
LABLE ON BACK OF BOTTLE SAYS CONTAINS ADDITIVE FOR LIMITED SLIP DIFFERENTIALS.