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The Revolution Gear & Axle Master Install Kit for pre‑1969 Ford 9in rear axles (31 spline) is a ring-and-pinion install solution matched to that axle spline count. It supports correct ring-and-pinion replacement on the listed classic Ford applications and provides axle-specific install components and fitment guidance to simplify differential rebuilds, restorations, or service while helping ensure accurate gear setup.
Revolution Gear & Axle Pre-69 Ford 9in Rear Axle 31 Spline Ring & Pinion Master Install Kit
