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  1. Transmission - Rearend
    Hi guys, a buddy of mine is having hard times finding a "faster" ratio for his truck, axle is an old Eaton HO72 . ring and pinion ratio is now 4.56:1, doing a research on the web we found a 4.10: wich is fairly good but we also found a 3.90:1 (wich would be great) early version wich apparently...