EXCEL F9370, Differential Ring & Pinion, For Ford 9", Gear Ratio 3.70, 10-Bolt, 28 Spline, 10 Pinion & 37 Ring Tooth Fits Ford Bronco, F-150, Mustang, Thunderbird, Rep. SVL 2020624, USA Standard 6137

["3.70 Ratio Ring & Pinion Set – Designed for Ford 9\" differentials, delivering optimal power and efficiency for various driving conditions.","Premium 8620 Steel Construction – Heat-treated for maximum durability, strength, and long-lasting performance.","Precision Fitment – Features 10-tooth pinion, 37-tooth ring gear, 28-spline pinion shaft, and 10-bolt configuration, ensuring smooth operation.","Standard Rotation & Dropout Design – Compatible with Ford 9\" rear differentials, providing excellent performance and reliability.","Package Includes – Ring & pinion gear set, backed by a 1-Year / 50,000-Mile Warranty. Fits Ford Bronco, Mustang, Thunderbird, Ranchero, and more (1955-1988)."]