Description
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






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