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Yukon USA standard ring-and-pinion set for GM 12-bolt passenger cars in a 3.90 ratio. Built for 12-bolt passenger car housings, the set features an 8.875-inch ring gear diameter, 12 ring gear bolts and a 30-spline pinion for direct-fit replacement. Yukon indicates these ring-and-pinion sets are manufactured to exceed OEM specification and are inspected with dimensional, material and fitment testing to help ensure reliable final-drive operation.
USA Standard Ring & Pinion Gear Set For GM 12 Bolt Car in a 3.90 Ratio
