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The Yukon USA Standard ring-and-pinion set for Ford 9-inch differentials (3.89 ratio) provides a direct-fit final-drive gear set for 9" axle assemblies needing a 3.89 ratio. Yukon inspects every set for dimensional, material, and fitment accuracy to exceed OEM standards. Fits a 9.00" ring gear diameter with 10 ring gear bolts and a 28-spline pinion, matching standard Ford 9" setups.
USA Standard Ring & Pinion Gear Set For Ford 9in in a 3.89 Ratio
