Gasket - Ford 9in Diff.

The Gasket - Ford 9in Diff. is a precision differential cover gasket engineered for Ford 9-inch differential assemblies used in performance and street vehicles. As a mechanic rebuilding or servicing differentials, you know that a quality gasket is the foundation of a leak-free, reliable differential assembly. This gasket prevents fluid seepage at the critical interface between the differential cover and housing, protecting your gear oil and maintaining proper lubrication under sustained load and high-RPM conditions.

Constructed with a 0.04-inch thick steel core laminate and PTFE (polytetrafluoroethylene) coating, this gasket delivers superior sealing integrity across temperature and pressure cycles. The steel core provides structural rigidity to resist crushing during cover bolt torque, while the PTFE coating ensures conformability to cover and housing surfaces, even when paint or light corrosion is present. This dual-material design eliminates the need for excessive sealant and reduces gasket creep—a common failure mode in high-performance differentials where thermal cycling and shock loads are frequent.

Ford 9-inch differential builders, restorationists, and street/strip racers depend on this gasket for both OEM restoration and modern performance builds. Whether you're reassembling a stock differential or installing a locker, limited-slip, or spool unit, proper gasket selection matters—undersized or compromised gaskets lead to leaks that contaminate brake components and underbody. Installation is straightforward: clean both mating surfaces to bare metal, position the gasket dry (PTFE coating does not require additional sealant), and torque the cover bolts in a cross pattern to manufacturer spec. Compatible with all Ford 9-inch housings, including those in Mustangs, Cougars, and dedicated drag or street rod platforms.