Wear out
My limited slip clutches always wore out (20,000 miles) long before the gear oil could wear out, LOL. I finally went to the Auburn Pro recently just for that very reason. I'll just have to wait to see how long it lasts.
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi.
O.B.C. #2
'66 coupe
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