Upgrade your Ford 9-inch rearend with the Speedmaster 1-215-001-03 Third Member Assembly, featuring a lightweight aluminum housing and a helical gear limited-slip differential for smooth, progressive torque transfer to both wheels without the chatter associated with clutch-style units. The 28-spline output and 3.50:1 ring-and-pinion ratio deliver a strong balance of acceleration and street or strip drivability.
Designed as a drop-in third member for Ford 9-inch axle housings, this assembly simplifies installation and makes gear changes faster than a traditional dropout-style rear. Whether you're building a performance street machine or a dedicated race car around the legendary Ford 9-inch platform, the Speedmaster LSD third member offers a reliable, ready-to-install solution.
