Yukon steel spool for Ford 9-inch with 31-spline axles converts the differential to a full spool, providing constant traction to both wheels for off-road and racing applications. It installs in place of the carrier assembly and is constructed for durability in demanding environments. This spool is intended for dedicated non-street use and is not recommended for regular road driving.
Yukon Gear Steel Spool For Ford 9in w/ 31 Spline Axles