Differential Shims
Circle Track Differential Shims at JJ Motorsports
Achieve precise gear alignment and optimal backlash in your circle track differential with high-quality shims from JJ Motorsports. These steel shim kits allow fine adjustments to reduce wear, improve power transfer, and maintain performance under extreme racing loads in IMCA, USMTS, late models, modifieds, and street stocks, compatible with Ford 9in, GM 10-bolt, and other popular rear ends.
Shop trusted brands like Motive Gear for GM carrier shims, Diversified Machine for CT-1 spool kits, and Richmond for Ford 8.8 sets. Explore related categories such as Circle Track Differentials and Rear End Components for complete rear end solutions or Circle Track Ring and Pinion Gears for gear upgrades.
Top Circle Track Differential Shims
- Carrier Shims 7.5 - 8.5 GM 10 Bolt Rearend SS10 – Differential Shim, Steel, Natural, Ford / GM, Kit; essential for precise carrier adjustment in GM 10-bolt differentials.
- DMI CT-1 Spool Shim Kit Large O.D. RRC-1286 – Differential Shim, 2.230 in OD, Steel, Spool, CT-1; designed for large OD spools in high-performance racing applications.
- Ford 8.8 Carrier Shims 38-0007-1 – Differential Shim, Ford 8.8 in / GM 10-Bolt, Kit; provides accurate shim adjustments for Ford 8.8 differentials.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Carrier Shims 7.5 - 8.5 GM 10 Bolt Rearend SS10
MOTIVE GEAR
$21.99Proper carrier shim selection is critical for maintaining correct differential bearing preload and backlash, which directly impacts gear life and driveline reliability. Inadequate preload causes premature bearing wear and noise, while excessive preload...MOTSS10- SKU:
- MOTSS10
- Availability:
- Ships Same Business Day
- Weight:
- 0.48 LBS
$21.99 -
DMI CT-1 Spool Shim Kit Large O.D. RRC-1286
DIVERSIFIED MACHINE
$43.99Spool differentials demand precision-engineered components to maintain lock consistency and eliminate slippage under load. The DMI CT-1 Spool Shim Kit delivers the exact tolerances your differential requires, ensuring repeatable performance whether...DMIRRC-1286- SKU:
- DMIRRC-1286
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$43.99 -
Ford 8.8 Carrier Shims 38-0007-1
RICHMOND
$10.99Precise differential carrier shimming is critical for maintaining proper gear mesh and backlash in your Ford 8.8 or GM 10-bolt rear end. Incorrect shim spacing leads to premature wear, noise, and loss of power transfer—especially under aggressive driving...RIC38-0007-1- SKU:
- RIC38-0007-1
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$10.99 -
GM 8.5 Carrier Shims 38-0006-1
RICHMOND
$13.99Proper differential shim selection is critical for maintaining precise bearing preload and backlash settings—neglecting this step leads to premature wear, noise, and potential catastrophic failure. Whether you're rebuilding a worn differential or...RIC38-0006-1- SKU:
- RIC38-0006-1
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$13.99 -
Winters Aluminum Spool Carrier Shim 2.031 in ID Steel Set of 12 WIN5295
WINTERS
$9.49Differential shimming is critical to eliminating backlash and maintaining consistent lock-up in high-performance spools—improper shim selection leads to play, noise, and premature wear. This OEM-quality steel shim set is engineered specifically for...WIN5295- SKU:
- WIN5295
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MFG Part #:
- 5295
$9.49 -
Differential Shim Kit KT0445
FRANKLAND RACING
$13.99Proper differential shimming is critical for maintaining gear preload, reducing backlash, and extending the service life of your quick-change differential. Whether you're fine-tuning gear mesh or replacing worn components, this Frankland-compatible shim...FRKKT0445- SKU:
- FRKKT0445
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- KT0445
$13.99 -
DMI CT1 Spool Shim Kit RRC-1276
DIVERSIFIED MACHINE
$43.99Proper spool shimming is critical for achieving consistent differential engagement and eliminating unwanted backlash in high-performance applications. The DMI CT1 Spool Shim Kit gives you precise control over preload and clearance, ensuring your...DMIRRC-1276- SKU:
- DMIRRC-1276
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- RRC-1276
$43.99 -
Allstar Performance Differential Shim Kit for Ford 8" Axle ALL68639
ALLSTAR PERFORMANCE
$37.99Proper differential setup is critical to reliability and performance, and getting pinion depth and bearing preload wrong will result in premature failure or catastrophic damage. This Allstar Performance Shim Kit provides all the precision components you...ALL68639- SKU:
- ALL68639
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- MFG Part #:
- ALL68639
$37.99 -
Allstar Performance Shim Kit for Mopar 8-3/4 with 742 Casting 1.796" I.D. Carrier Bearings ALL68637
ALLSTAR PERFORMANCE
$59.99If you're rebuilding or servicing a Mopar 8-3/4 differential with a 742 casting, proper pinion depth and bearing preload are non-negotiable—get them wrong and you're looking at premature wear, noise, and potential drivetrain failure. This Allstar...ALL68637- SKU:
- ALL68637
- Availability:
- Ships Same Business Day
- Weight:
- 1.62 LBS
- MFG Part #:
- ALL68637
$59.99 -
Allstar Performance Shim Kit for Dana 60 and 61 Axles 1966-1998 ALL68634
ALLSTAR PERFORMANCE
$61.99Proper ring and pinion setup is critical to differential longevity and performance. Incorrect shimming leads to premature wear, noise, and potential failure under load. This Allstar Performance Shim Kit gives you all the components needed for precise...ALL68634- SKU:
- ALL68634
- Availability:
- Ships Same Business Day
- Weight:
- 2.22 LBS
- MFG Part #:
- ALL68634
$61.99 -
Allstar Performance Shim Kit Dana 44 1967-1997 ALL68633
ALLSTAR PERFORMANCE
$39.99Dana 44 differentials demand precision shimming to maintain proper bearing preload and minimize backlash—critical factors that directly impact handling response, tire wear, and drivetrain longevity. This Allstar Performance Shim Kit delivers a complete...ALL68633- SKU:
- ALL68633
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- MFG Part #:
- ALL68633
$39.99 -
Allstar Performance Shim Kit for Mopar 8-3/4 489 Case ALL68631
ALLSTAR PERFORMANCE
$54.99Setting 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...ALL68631- SKU:
- ALL68631
- Availability:
- Ships Same Business Day
- Weight:
- 2.13 LBS
- MFG Part #:
- ALL68631
$54.99 -
Allstar Performance Shim Kit GM 8.2in 10 Bolt 1964-72 ALL68622
ALLSTAR PERFORMANCE
$47.99Proper pinion depth and gear preload are critical to differential longevity and performance—incorrect setup leads to premature wear, noise, and catastrophic failure. This complete shim kit gives you all the components needed to dial in your GM 8.2-inch...ALL68622- SKU:
- ALL68622
- Availability:
- Ships Same Business Day
- Weight:
- 1.88 LBS
- MFG Part #:
- ALL68622
$47.99 -
Allstar Performance Shim Kit GM 8.5in 10 Bolt 1970-98 ALL68621
ALLSTAR PERFORMANCE
$43.99Proper differential setup is critical for consistent performance and longevity, especially in high-stress racing applications. This comprehensive shim kit gives you the precision adjustment needed to dial in pinion depth and preload on GM 8.5-inch...ALL68621- SKU:
- ALL68621
- Availability:
- Ships Same Business Day
- Weight:
- 2.07 LBS
- MFG Part #:
- ALL68621
$43.99 -
Allstar Performance Shim Kit for GM 8.875" 12-Bolt Passenger Car Axle ALL68619
ALLSTAR PERFORMANCE
$47.99Proper differential assembly is critical for maintaining driveline integrity and consistent performance under load. This comprehensive shim kit eliminates guesswork by providing all necessary components for correct pinion depth and bearing preload setup...ALL68619- SKU:
- ALL68619
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- MFG Part #:
- ALL68619
$47.99 -
Allstar Performance Differential Shim Kit for GM 8.875in 12-Bolt Truck ALL68618
ALLSTAR PERFORMANCE
$49.99A properly shimmed and assembled differential is critical to reducing backlash, maintaining gear alignment, and preventing premature wear in your GM 12-bolt truck rear end. This Allstar Performance kit supplies all the precision components needed for...ALL68618- SKU:
- ALL68618
- Availability:
- Ships Same Business Day
- Weight:
- 2.21 LBS
- MFG Part #:
- ALL68618
$49.99 -
Allstar Performance Shim Kit GM 7.5in 10 Bolt 1982-1998 ALL68615
ALLSTAR PERFORMANCE
$43.99Proper pinion depth and bearing preload are critical to differential longevity and performance—improper setup leads to premature wear, noise, and catastrophic failure. This complete shim kit eliminates guesswork during assembly or rebuild, ensuring your...ALL68615- SKU:
- ALL68615
- Availability:
- Ships Same Business Day
- Weight:
- 1.79 LBS
- MFG Part #:
- ALL68615
$43.99 -
Allstar Performance Shim Kit Ford 9in with Crush Sleeve ALL68611
ALLSTAR PERFORMANCE
$32.99Proper pinion preload and differential setup are critical for Ford 9-inch rear end reliability and performance—improper shimming leads to premature wear, noise, and catastrophic failure. The Allstar Performance Shim Kit eliminates guesswork by providing...ALL68611- SKU:
- ALL68611
- Availability:
- Ships Same Business Day
- Weight:
- 1.68 LBS
- MFG Part #:
- ALL68611
$32.99 -
Allstar Performance Shim Kit Ford 9in with Solid Spacer ALL68610
ALLSTAR PERFORMANCE
$41.99Proper pinion depth and gear preload are critical to Ford 9-inch differential performance and longevity. This Allstar shim kit gives you the precision adjustment tools needed to dial in exact bearing preload and minimize backlash, ensuring maximum power...ALL68610- SKU:
- ALL68610
- Availability:
- Ships Same Business Day
- Weight:
- 1.74 LBS
- MFG Part #:
- ALL68610
$41.99 -
Allstar Performance Shim Kit Ford 8.8in ALL68613
ALLSTAR PERFORMANCE
$44.99Proper differential assembly requires precision shimming to achieve correct bearing preload and gear backlash—critical factors that directly impact durability, noise levels, and power delivery in your Ford 8.8in rear end. This comprehensive shim kit...ALL68613- SKU:
- ALL68613
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- MFG Part #:
- ALL68613
$44.99
