Shim Kit Ford 8in

The Shim Kit Ford 8in by Allstar Performance is a complete differential assembly solution engineered for serious gear and pinion setup on Ford 8-inch rear differentials. Whether you're building a street machine, prepping for track duty, or restoring a classic muscle car, this kit provides all the critical shims, fasteners, and crush sleeve components necessary to achieve factory-correct pinion bearing preload and ring gear backlash. This is essential maintenance for anyone who has pulled a Ford 8-inch pumpkin or is installing a new differential assembly and wants the job done right the first time.

Proper pinion depth and preload are non-negotiable for differential longevity and performance. The Shim Kit Ford 8in includes precision shims that control pinion retainer geometry, allowing you to dial in exact crush sleeve compression and bearing preload without guesswork. Crush sleeve deformation is the standard method for setting pinion bearing tension—too loose and you'll hear noise and suffer bearing wear; too tight and you'll create friction losses and heat. The included pinion nut, bolts, and full shim assortment let you dial in the correct spec every time, protecting your gears from premature failure and ensuring smooth, quiet operation under load.

Mechanics, restoration shops, and drag racers trust Allstar Performance for differential service kits because the precision matters. If you're rebuilding a Ford 8-inch—whether it's a 1970s Mustang, F-100, or any classic Fairlane—this kit saves time by bundling the consumable hardware you'll need for proper assembly. Pair this with a quality dial indicator and pinion depth gauge for professional results. Compatible with all Ford 8-inch differentials using standard crush-sleeve preload design, this is a must-have for any serious project.