8.8in IRS Bearing Seal Kit

The Ford 8.8in IRS Bearing Seal Kit (M-4413-A) is a OEM-spec axle bearing and seal assembly designed for the Ford 8.8-inch independent rear suspension system. This kit delivers the precision fit and durability required for vehicles running factory or performance rear differentials, making it an essential component for anyone rebuilding or servicing a Ford IRS rear end.

The bearing features a 1.97-inch outer diameter and 1.607-inch inner diameter roller bearing design, sized to handle the load and rotational demands of the 8.8-inch platform across street, off-road, and track applications. The integrated seal prevents differential fluid loss and contamination ingress—critical factors for longevity in dusty environments, water crossings, or extended high-load driving. As a complete kit, it eliminates the need to source seal and bearing components separately, reducing assembly time and ensuring proper fit between matched components.

This kit is essential for Ford 8.8-inch IRS rear end rebuilds, whether you're restoring a classic platform, upgrading a performance vehicle, or servicing a worn differential assembly. The bearing seal kit addresses seal wear, play, and fluid leakage that develop over time and high-mileage service. Technicians and enthusiasts performing axle work rely on OEM-specification components like this to ensure the rear suspension operates without premature wear or failure.

The Ford 8.8-inch platform remains one of the most robust and affordable rear suspension systems available, supported by decades of proven parts availability and engineering documentation. This bearing seal kit maintains that reliability by delivering genuine OEM-spec replacement components for continued performance and durability.