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      06-29-2013, 12:55 PM   #90
phozenstone
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Drives: 2007 E92 Montego Blue
Join Date: Apr 2007
Location: NY

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Perhaps you underfilled the diff causing the fluid to burn and become dark? I used redline as well 3K miles ago (50K miles) on both front and rear but haven't checked the fluid since. I was planning to change again at 75K.
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