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      08-27-2014, 10:30 AM   #65
Drives: '09 M3
Join Date: Dec 2007
Location: SC

Posts: 604
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Originally Posted by EarthboundMisfit View Post
Anyone tried Red Line 75W140 gear oil in their diff?
Yes, have about 15,000 miles on mine now. No problems and no noises at all. I previously had diff noise, they (dealer changed) and added modifier and it helped but still has occasional noise on tight corners. That's gone now with the Redline (make sure you get the limited slip version as there are two kinds).
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