8.8in IRS Bearing Seal Kit

The Ford 8.8in IRS Bearing Seal Kit (M-4413-A) is an OEM-specification axle bearing and seal assembly designed for Ford's independent rear suspension systems. This kit is ideal for enthusiasts and mechanics involved in rebuilding or maintaining 8.8-inch IRS differentials, particularly in Fox-body and SN95 Mustangs, as well as other Ford platforms with this rear end configuration.

Proper bearing seals are critical to differential longevity, preventing gear oil contamination and protecting internal components from moisture and debris ingress. This bearing seal kit contains factory-grade seals and bearing components manufactured to OEM specifications, ensuring a precision fit and reliable performance under both street and spirited driving conditions. The seals effectively prevent axle fluid leakage while maintaining proper lubrication flow to the bearing races, reducing friction and heat generation during acceleration and cornering.

This kit is essential for anyone performing a full differential rebuild, upgrading to higher-ratio gears, or addressing signs of gear oil seepage around the axle flanges. Installation requires removing the differential cover and disassembling the axle shafts, making it a natural part of any comprehensive rear-end service. With compatibility across various Ford IRS applications, this kit is a reliable choice for maintaining the structural integrity of your differential.