axle oil

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03-08-2007, 07:50 PM

built54

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axle oil

I have the 9.75 with factory limited slip. I want to buy the royal purple oil made for limited slip diffs, what weight should i get?

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03-09-2007, 03:37 AM

glc

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75W-140 full synthetic is required along with a bottle of Ford friction modifier.

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03-28-2007, 06:54 PM

dozer76

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I heard that Royal Purple already has a friction modifier.

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