RLE55
Well-Known Member
Don't necessarily need 75w140 in the a stock stang, although it won't hurt it, those diffs get hot and heat is not a diffs friend. I was mostly pointing out the friction modifier. I used 75w140 in my mustang track car with Torsen T-2R...lots of heat generated.Why 75w140 over a 75w85 or 75w90?
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