The Speedmaster 1-215-001-02 is a complete Ford 9-inch third member assembly built around a helical gear limited-slip differential, delivering smooth, automatic torque transfer without the locking harshness of clutch-plate units. The lightweight aluminum housing helps reduce unsprung weight while housing a 28-spline carrier and a 3.25:1 ring-and-pinion ratio suited for a balance of acceleration and highway cruising.
Designed as a bolt-in replacement for standard Ford 9-inch rear axle housings, this third member arrives as a ready-to-install assembly, simplifying your build or upgrade process. Whether you are refreshing a street machine or building a dedicated performance vehicle around the legendary Ford 9-inch platform, this Speedmaster unit offers a reliable, performance-focused foundation.
