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The Revolution Gear & Axle 3.89 ratio ring and pinion set for Ford 9in applications offers a direct-replacement gear pair to deliver a 3.89 final drive. Intended for axle rebuilds or gear swaps, this ring and pinion set restores proper gear engagement and final-drive ratio in Ford 9-inch differentials, providing the core drivetrain component needed to match desired speed and torque behavior.
Revolution Gear & Axle Ford 9in 3.89 Ratio Ring & Pinion Set
