Ford 9" 31 Spline Limited-Slip Differential Rebuild Kit

The Speedway Motors 91910031 Ford 9 Inch Limited-Slip Differential Rebuild Kit combines the key components needed to upgrade or rebuild a Ford 9-inch rear end into one convenient package. This kit includes a Motive Gear performance ring and pinion set, a 31-spline clutch-style limited-slip differential, and a complete overhaul kit with the bearings, seals, shims, hardware, and installation components required for proper setup.

Designed for street, performance, and racing applications, the kit provides improved traction through a clutch-style limited-slip carrier while allowing customers to tailor performance with a choice of gear ratios. Available ratios include 3.00, 3.25, 3.50, 3.70, 3.89, 4.11, and 4.56, making it easy to optimize acceleration, top-speed characteristics, or overall drivability for specific vehicle setups.

The included Motive Gear ring and pinion is manufactured for strength and durability, while the 31-spline clutch-style differential offers smooth, quiet limited-slip operation without the harsh engagement characteristics of a spool or locker. Completing the package, the overhaul kit provides the critical bearings, seals, crush sleeve, shims, sealant, and setup materials needed to streamline installation and ensure reliable performance.

• Ring gear diameter 9"
• 10-7/16" x 20 RH threaded bolts
• Pinion diameter 1.313" 28 splines
• 8620 Material - Heat Treated
• Choose your ratio

9190950-31

• Includes carrier bearing # LM102949
• 31-spline axles DO NOT guarantee that the LM102949 bearings are used in the carrier. If in doubt, double check the bearings used and then order accordingly.