Differentials and Rear-End Components
Circle Track Differentials & Rear End Components at JJ Motorsports
Differentials and rear-end components are essential for transferring power to the wheels while ensuring balance and control during cornering in circle track racing. Engineered for maximum durability, these parts are tailored for late models and modifieds, delivering reliable performance under extreme conditions. Pair them with advanced drivetrain enhancements for a smooth, powerful drive that keeps your vehicle competitive on the track.
Shop trusted brands like Allstar Performance for versatile components, PEM for stamped housings, and Winters for quick-change options. Explore related categories such as Circle Track Front/Rear End Assemblies for complete kits or Circle Track Axle Shafts for durable upgrades.
Top Circle Track Differentials & Rear End Components
- Dirt Street Stock/Hobby Stock Floater Rear End 2.5" GN Kit – Kit includes Floater Metric Housing 60" 2.5" Grand National, (2) Wilwood Brake Rotors .810 x 11.75, (2) 31-Spline Solid Axles, (2) 5x5 Rear Hub Kits Steel with 5/8-11 Studs, (2) Wheel Hub Bearing Kits with Seals, Lug Nuts, Rotor Bolts.
- Allstar Performance Remote Fill Tank ALL36110 – Remote Fill Tank, Flush Mount, 10 AN Outlet, Aluminum, Each.
- PEM New Stamped Floater Metric Housing 60in Cent HNMK3003005 – Rear Axle Housing, Ford 9 in Floater, 60 in Wide, Centered, 3 in Tubes, 5 x 5 in Hub, 0.810 in Thick Rotors, Steel, Natural, Each.
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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Allstar Performance Spool Cross Pin Ford 8.8/9in ALL68120
ALLSTAR PERFORMANCE
$15.99A quality spool cross pin is essential for maintaining gear engagement and differential performance under high-stress racing conditions. When your factory pin shows wear or you're upgrading to a spool setup, this Allstar Performance cross pin delivers...ALL68120- SKU:
- ALL68120
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- MFG Part #:
- ALL68120
$15.99 -
Allstar Performance Spool QC 31spl Aluminum Frankland Tiger ALL68115
ALLSTAR PERFORMANCE
$314.99Quick-change rear ends demand a spool that can handle both precision and abuse—this Allstar Performance aluminum spool delivers uncompromising strength without the weight penalty. Built for serious racers who need reliable power delivery lap after lap,...ALL68115- SKU:
- ALL68115
- Availability:
- Ships Same Business Day
- Weight:
- 6.83 LBS
- MFG Part #:
- ALL68115
$314.99 -
Allstar Performance Spool QC 31spl Aluminum Winters DMI ALL68114
ALLSTAR PERFORMANCE
$289.99If you're running a quick-change rear end, you need a spool that delivers consistent power distribution without compromise. The Allstar Performance Spool QC locks both wheels together for maximum traction off the line, giving you the mechanical advantage...ALL68114- SKU:
- ALL68114
- Availability:
- Ships Same Business Day
- Weight:
- 6.05 LBS
- MFG Part #:
- ALL68114
$289.99 -
Allstar Performance Spool 9in Ford 40 Spline 3.250in Case ALL68074
ALLSTAR PERFORMANCE
$199.99If you're running a 9-inch Ford rear axle in a high-performance application, a quality spool is essential for consistent traction and predictable power delivery. The Allstar Performance Spool replaces traditional positraction units with a straightforward...ALL68074- SKU:
- ALL68074
- Availability:
- Ships Same Business Day
- Weight:
- 7.81 LBS
- MFG Part #:
- ALL68074
$199.99 -
Allstar Performance Spool 9in Ford 35 Spline 2.893-3.062 Case ALL68072
ALLSTAR PERFORMANCE
$199.99If you're running a Ford 9-inch differential, switching from a traditional carrier to a spool is one of the most direct ways to maximize traction and eliminate wheel hop during acceleration. The Allstar Performance ALL68072 delivers power equally to both...ALL68072- SKU:
- ALL68072
- Availability:
- Ships Same Business Day
- Weight:
- 8.52 LBS
- MFG Part #:
- ALL68072
$199.99Qty in Cart: 0Quantity:Price:$199.99Subtotal: -
Allstar Performance Spool 9in Ford 35 Spline 3.250in Case ALL68070
ALLSTAR PERFORMANCE
$184.99If you're running a Ford 9-inch rear end and want equal power delivery to both wheels without the binding and tire-scrubbing issues of a locker, a spool is your most direct solution. The Allstar Performance Spool delivers consistent traction by...ALL68070- SKU:
- ALL68070
- Availability:
- Ships Same Business Day
- Weight:
- 9.00 LBS
- MFG Part #:
- ALL68070
$184.99 -
Allstar Performance Spool 9in Ford 31 Spline Ultralite Scalloped ALL68067
ALLSTAR PERFORMANCE
$199.99If you're running a Ford 9-inch rear end and need absolute reliability under extreme load, this Allstar Performance spool eliminates wheel spin and delivers consistent power delivery to both rear wheels. The ultra-lite scalloped design reduces unsprung...ALL68067- SKU:
- ALL68067
- Availability:
- Ships Same Business Day
- Weight:
- 6.50 LBS
- MFG Part #:
- ALL68067
$199.99 -
Allstar Performance Spool 9in Ford 31 Spline Ultralite ALL68066
ALLSTAR PERFORMANCE
$159.99A spool eliminates differential action entirely, delivering maximum traction by locking both rear wheels together—essential for drag racing, oval track competition, and high-grip applications where consistency matters more than cornering finesse. The...ALL68066- SKU:
- ALL68066
- Availability:
- Ships Same Business Day
- Weight:
- 6.40 LBS
- MFG Part #:
- ALL68066
$159.99 -
Allstar Performance Spool 9in Ford 28 Spline Ultralite ALL68062
ALLSTAR PERFORMANCE
$149.99Eliminate wheel spin and maximize traction off the line with the Allstar Performance Spool 9in Ford 28 Spline Ultralite. This full-spool design locks both rear wheels together for absolute power transfer to the pavement—essential for drag racing, circle...ALL68062- SKU:
- ALL68062
- Availability:
- Ships Same Business Day
- Weight:
- 6.64 LBS
- MFG Part #:
- ALL68062
$149.99 -
Allstar Performance Spool 9in Ford 28 Spline ALL68060
ALLSTAR PERFORMANCE
$159.99A spool eliminates differential action entirely, locking both rear wheels together for maximum traction during hard acceleration and cornering. This is essential for dedicated track cars, drag racing applications, and high-performance street vehicles...ALL68060- SKU:
- ALL68060
- Availability:
- Ships Same Business Day
- Weight:
- 9.57 LBS
- MFG Part #:
- ALL68060
$159.99 -
Allstar Performance Ford 9in Axle 31 Spline W/Bearing 33in ALL67503
ALLSTAR PERFORMANCE
$249.99If you're running a Ford 9-inch rear end and need a reliable, ready-to-install axle shaft, the Allstar Performance 31-spline unit eliminates guesswork with proper fitment and included bearing support. Built for drag racing, road racing, and street...ALL67503- SKU:
- ALL67503
- Availability:
- Ships Same Business Day
- Weight:
- 22.50 LBS
- MFG Part #:
- ALL67503
$249.99 -
Allstar Performance Ford 9in Axle 31 Spline 33in ALL67502
ALLSTAR PERFORMANCE
$219.99If you're building a Ford 9-inch rear end, you need an axle shaft engineered for your specific application—not a generic compromise. The Allstar Performance Ford 9in Axle delivers the exact spline count and length your carrier demands, ensuring proper...ALL67502- SKU:
- ALL67502
- Availability:
- Ships Same Business Day
- Weight:
- 20.60 LBS
- MFG Part #:
- ALL67502
$219.99 -
Allstar Performance Ford 9in Axle 31 Spline W/Bearing 29-1/2in ALL67501
ALLSTAR PERFORMANCE
$249.99If you're building or rebuilding a Ford 9-inch rear end for street or strip duty, a quality axle shaft is non-negotiable—it's your direct link between power delivery and tire grip. The Allstar Performance Ford 9in Axle delivers the strength and precision...ALL67501- SKU:
- ALL67501
- Availability:
- Ships Same Business Day
- Weight:
- 21.10 LBS
- MFG Part #:
- ALL67501
$249.99 -
Allstar Performance Ford 9in Axle 31 Spline 29-1/2in ALL67500
ALLSTAR PERFORMANCE
$219.99A quality axle shaft is the backbone of any reliable rear-end setup, especially in high-performance and racing applications where durability under load is non-negotiable. This Allstar Performance Ford 9-inch axle delivers the strength and precision you...ALL67500- SKU:
- ALL67500
- Availability:
- Ships Same Business Day
- Weight:
- 19.25 LBS
- MFG Part #:
- ALL67500
$219.99 -
Allstar Performance Axle 28 Spl 30.0 Solid ALL67301
ALLSTAR PERFORMANCE
$149.99A quality axle shaft is the backbone of reliable power delivery to your wheels—especially under high-load racing conditions where flex and failure aren't options. The Allstar Performance 28 Spline 30.0 Solid Axle delivers the strength and precision you...ALL67301- SKU:
- ALL67301
- Availability:
- Ships Same Business Day
- Weight:
- 9.44 LBS
- MFG Part #:
- ALL67301
$149.99 -
Allstar Performance Axle 31 Spl 37.5 Solid ALL66376
ALLSTAR PERFORMANCE
$149.99A solid axle shaft is fundamental to any reliable rear-end assembly, and this Allstar Performance unit delivers the durability and precision you need for consistent power delivery. Whether you're building a quick-change setup or upgrading an existing...ALL66376- SKU:
- ALL66376
- Availability:
- Ships Same Business Day
- Weight:
- 12.61 LBS
- MFG Part #:
- ALL66376
$149.99 -
Allstar Performance Axle 31 Spl 37.0 Solid ALL66371
ALLSTAR PERFORMANCE
$149.99A quality axle shaft is foundational to any rear-end build—it needs to handle load transfer, rotational forces, and repeated stress without compromise. This Allstar Performance 31-spline solid axle delivers the strength and durability required for...ALL66371- SKU:
- ALL66371
- Availability:
- Ships Same Business Day
- Weight:
- 12.22 LBS
- MFG Part #:
- ALL66371
$149.99 -
Allstar Performance Axle 31 Spl 37.0 GD ALL66370
ALLSTAR PERFORMANCE
$229.99A quality axle shaft is fundamental to reliable rear-end performance, whether you're running quick-change or Ford 9-inch differentials. The Allstar Performance 31-spline axle delivers the strength and precision you need for consistent power delivery...ALL66370- SKU:
- ALL66370
- Availability:
- Ships Same Business Day
- Weight:
- 8.46 LBS
- MFG Part #:
- ALL66370
$229.99 -
Allstar Performance Axle 31 Spl 36.5 Solid ALL66366
ALLSTAR PERFORMANCE
$149.99A quality axle shaft is foundational to reliable rear-end performance, especially if you're running a quick-change or 9-inch Ford differential in a street or strip application. Allstar Performance's 31-spline solid axles deliver the durability and...ALL66366- SKU:
- ALL66366
- Availability:
- Ships Same Business Day
- Weight:
- 12.36 LBS
- MFG Part #:
- ALL66366
$149.99 -
Allstar Performance Axle 31 Spl 36.5 GD ALL66365
ALLSTAR PERFORMANCE
$229.99Whether you're building a street machine, prepping for the strip, or upgrading a dedicated race car, a quality axle shaft is foundational to reliable power delivery and longevity. Allstar Performance's 31-spline solid axles deliver the strength and...ALL66365- SKU:
- ALL66365
- Availability:
- Ships Same Business Day
- Weight:
- 4.04 LBS
- MFG Part #:
- ALL66365
$229.99
