Ford 9in. Steel Full Spool 35 Spline

Moser Engineering built this chromoly full spool for Ford 9-inch rear axles with 35-spline shafts that need total traction. It bolts both wheels to the ring gear so 100% of the power goes to the ground, making it a go-to for drag racing, mud bogging, rock crawling, and any situation where wheel slip cannot happen.

Forged from chromoly steel and made for 35-spline Ford 9-inch housings, this spool stands up to the heavy loads found in built cars. The full-spool setup gets rid of the differential action inside a standard carrier. Both wheels spin as one, with zero speed difference between the two sides. This is not a limited-slip or open diff—it is a full mechanical lock.

Built for owners running modified Ford 9-inch axles in purpose-built machines where the handling trade-offs are worth the launch grip. You will find these in dedicated drag cars, off-road race rigs, and heavy-load setups that call for full diff lock-up.