Spool 9in Ford 31 Spline

The Spool 9in Ford 31 Spline is a vital drivetrain component designed for circle-track racers, drag racing platforms, and high-performance street machines that require maximum traction control. This spool locks both axles together as a solid unit, eliminating differential action between the left and right wheels, making it ideal for competitors who prioritize launch consistency and straight-line acceleration.

Constructed by ALLSTAR PERFORMANCE, this spool is specifically engineered to work with 9-inch Ford differentials using the 31-spline axle standard. It replaces the stock clutch pack assembly and provides a fully locked power distribution, ensuring that both rear wheels receive power simultaneously. The robust design is capable of handling extreme torque loads typical of high-performance engines without deflection or failure.

This component is particularly beneficial for track environments where traction is critical, and it is best suited for experienced mechanics due to the installation process, which requires removal of the carrier assembly. Once installed, the spool is a passive component that requires no maintenance, making it a reliable choice for serious racers.