Ford 9 in. 31 Spline LSD TorqueWorm® Nodular Iron Third Member Assembly Ratio:5.43:1 it ensures a reliable fit

it ensures a reliable fit and long-lasting performance in various automotive applications

Tune your rpm-activated control to your application with one of these Speedmaster rpm module kits

Almost 10% larger that stock intermediate piston

These aluminum push-in breathers from Speedmaster are just the thing to prevent oil splash while adding some style

e-brake and mounting assembly

Ford 9 in. 31 Spline LSD TorqueWorm® Nodular Iron Third Member Assembly Ratio:5.43:1 it ensures a reliable fitSpeedmaster Ford 9 in. third member assemblies are designed to help you get that horsepower to the ground. They include high quality nodular iron thru bolt design center section, as well as our famous TorqueWorm geared limited slip differential, 1350 series yoke, daytona pinion support, and gear ratio. Whether you're assembling a daily driver, street rod, or race car, Speedamster's third member assemblies will provide the durability that your vehicle