Install your gears right the first time with 1994-04 Mustang Gear Install Kits, Bearing Kits, & Hardware. These Yukon and Ford Racing kits provide you with everything you need to replace the seals, bearings, races and shims in your 7.5 or 8.8 differential. Pinion bearing, axle bearing, seals, and races can also be bought without purchasing the whole kit. Add gear oil, friction modifier and a differential gasket to finish off your gear install.