Allstar Performance Shim Kit for Mopar 8-3/4 489 Case ALL68631

Setting up a Mopar 8-3/4 rear axle requires precise shimming and pre-load adjustment—tasks that demand the right components and zero guesswork. This Allstar Performance Shim Kit eliminates the frustration of sourcing individual hard-to-find parts by bundling everything you need for a professional-grade differential installation. Whether you're building a street machine or prepping for the track, having a complete, purpose-built kit ensures your rear end will perform reliably under load.

The kit includes all critical components needed for proper pinion depth, bearing pre-load, and axle retention. Each piece is manufactured to high-performance standards, giving you confidence that your differential assembly will hold up to sustained power delivery. This is a bolt-together solution that saves time, reduces the risk of missing fasteners or shims, and gets your build moving forward without delays.

• Fitment: Mopar 8-3/4-inch, 489 casting
• Contents: Pinion retainer, pre-load shims, bolts, crush sleeve, pinion nut
• Material: High-performance grade steel
• Installation: Bolt-together kit
• Part Number: ALL68631
• Weight: 2.13 lbs
• Package Dimensions: 11.9" L × 10.9" W × 2.3" H