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 Axle Retainer 9in Big Late/Torino Steel 3/16in Thick ALL72316
ALLSTAR PERFORMANCE
$15.49If you're rebuilding a Ford 9-inch rear end, this axle retainer plate eliminates a frustrating installation step by letting you keep the bearing seated on the axle—saving you time and reducing the risk of bearing damage during setup. The 3/16-inch steel...ALL72316- SKU:
- ALL72316
- Availability:
- Ships Same Business Day
- Weight:
- 0.57 LBS
- MFG Part #:
- ALL72316
$15.49 -
Allstar Performance Ford 9in Axle Bearing Assembly ALL72315
ALLSTAR PERFORMANCE
$39.99A worn or failing axle bearing will compromise your differential's structural integrity and lead to catastrophic drivetrain failure—especially under the high loads of racing or aggressive driving. This Allstar Performance Ford 9in axle bearing assembly...ALL72315- SKU:
- ALL72315
- Availability:
- Ships Same Business Day
- Weight:
- 1.68 LBS
- MFG Part #:
- ALL72315
$39.99 -
Allstar Performance Ring & Pinion GM 8.5 4.56 ALL70128
ALLSTAR PERFORMANCE
$169.99A 4.56 ring and pinion ratio is engineered for maximum acceleration and torque multiplication, making it the ideal choice for drag racing, street performance builds, or vehicles running forced induction where low-end power dominates. This Allstar kit...ALL70128- SKU:
- ALL70128
- Availability:
- Ships Same Business Day
- Weight:
- 18.80 LBS
- MFG Part #:
- ALL70128
$169.99 -
Allstar Performance Ring & Pinion GM 8.5 4.10 ALL70126
ALLSTAR PERFORMANCE
$169.99If you're running a GM 8.5 10-bolt rear end and need aggressive acceleration for street or strip duty, a 4.10 ring and pinion kit is the direct path to lower ET times and quicker throttle response. This Allstar Performance kit delivers the gear ratio...ALL70126- SKU:
- ALL70126
- Availability:
- Ships Same Business Day
- Weight:
- 18.48 LBS
- MFG Part #:
- ALL70126
$169.99 -
Allstar Performance Ring & Pinion GM 8.5 3.73 ALL70124
ALLSTAR PERFORMANCE
$169.99A 3.73 ring and pinion ratio is the sweet spot for street performance and weekend track duty—delivering quicker acceleration off the line without sacrificing highway cruising capability. If you're running a GM 8.5 rear and want bolt-in gear improvement...ALL70124- SKU:
- ALL70124
- Availability:
- Ships Same Business Day
- Weight:
- 18.18 LBS
- MFG Part #:
- ALL70124
$169.99 -
Allstar Performance Ring & Pinion GM 8.5 3.42 ALL70122
ALLSTAR PERFORMANCE
$169.99Gear ratio selection directly impacts your acceleration, top speed, and overall drivability—and a 3.42 ratio delivers the sweet spot for street and road racing applications. The Allstar Performance Ring & Pinion Kit gives you OEM-quality components with...ALL70122- SKU:
- ALL70122
- Availability:
- Ships Same Business Day
- Weight:
- 17.91 LBS
- MFG Part #:
- ALL70122
$169.99 -
Allstar Performance Ring & Pinion GM 8.5 3.08 ALL70120
ALLSTAR PERFORMANCE
$169.99A properly matched ring and pinion is fundamental to rear differential performance—it directly affects your power delivery, fuel efficiency, and drivetrain longevity. The Allstar Performance 3.08 ratio is engineered for GM 8.5 differentials and delivers...ALL70120- SKU:
- ALL70120
- Availability:
- Ships Same Business Day
- Weight:
- 13.07 LBS
- MFG Part #:
- ALL70120
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 4.56 ALL70118
ALLSTAR PERFORMANCE
$169.99A 4.56 ring and pinion ratio transforms your GM 7.5 differential into a hard-charging gear set engineered for track-focused acceleration and quick off-the-line response. Whether you're launching on the strip or carving through autocross, this Allstar...ALL70118- SKU:
- ALL70118
- Availability:
- Ships Same Business Day
- Weight:
- 12.96 LBS
- MFG Part #:
- ALL70118
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 4.10 Thick ALL70117
ALLSTAR PERFORMANCE
$169.99A 4.10 ring and pinion ratio delivers aggressive acceleration and improved launch characteristics for street and strip applications, making it the ideal choice for vehicles running forced induction or competing in drag racing events. This thick-profile...ALL70117- SKU:
- ALL70117
- Availability:
- Ships Same Business Day
- Weight:
- 14.46 LBS
- MFG Part #:
- ALL70117
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 4.10 ALL70116
ALLSTAR PERFORMANCE
$169.99A 4.10 ring and pinion ratio transforms your GM 7.5 differential into a gear set engineered for aggressive acceleration and improved launch characteristics—essential for strip performance, street racing, or high-demand off-road driving. Allstar...ALL70116- SKU:
- ALL70116
- Availability:
- Ships Same Business Day
- Weight:
- 12.77 LBS
- MFG Part #:
- ALL70116
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 3.73 Thick ALL70115
ALLSTAR PERFORMANCE
$169.99A 3.73 ring and pinion ratio delivers the ideal balance of acceleration and highway cruising for street performance builds and moderate track use. This Allstar kit provides precision-manufactured gears built to OEM tolerances, ensuring smooth engagement...ALL70115- SKU:
- ALL70115
- Availability:
- Ships Same Business Day
- Weight:
- 14.02 LBS
- MFG Part #:
- ALL70115
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 3.73 ALL70114
ALLSTAR PERFORMANCE
$169.99A 3.73 ring and pinion ratio delivers the ideal balance of acceleration and highway cruising for street-driven muscle cars and dedicated track builds on a GM 10-bolt platform. This Allstar Performance kit provides the gearing efficiency you need without...ALL70114- SKU:
- ALL70114
- Availability:
- Ships Same Business Day
- Weight:
- 12.61 LBS
- MFG Part #:
- ALL70114
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 3.42 Thick ALL70113
ALLSTAR PERFORMANCE
$169.99A 3.42 ring and pinion ratio is the sweet spot for street and strip applications—delivering aggressive acceleration off the line without sacrificing highway drivability. This Allstar Performance kit is precision-cut and ready to bolt into your GM 7.5...ALL70113- SKU:
- ALL70113
- Availability:
- Ships Same Business Day
- Weight:
- 13.90 LBS
- MFG Part #:
- ALL70113
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 3.42 ALL70112
ALLSTAR PERFORMANCE
$169.99A 3.42 ring and pinion ratio gives you the efficiency of highway cruising while maintaining enough mechanical advantage for responsive acceleration—ideal for street/strip applications where versatility matters. This Allstar Performance kit is...ALL70112- SKU:
- ALL70112
- Availability:
- Ships Same Business Day
- Weight:
- 11.99 LBS
- MFG Part #:
- ALL70112
$169.99 -
Allstar Performance Ring & Pinion GM 7.5 3.23 ALL70110
ALLSTAR PERFORMANCE
$169.99A properly matched ring and pinion is fundamental to rear differential performance—it directly impacts acceleration response, fuel economy, and engine longevity. The Allstar 3.23 ratio strikes an ideal balance for street and strip applications,...ALL70110- SKU:
- ALL70110
- Availability:
- Ships Same Business Day
- Weight:
- 11.72 LBS
- MFG Part #:
- ALL70110
$169.99 -
Allstar Performance 7.5 Ring Gear Spacer ALL70100
ALLSTAR PERFORMANCE
$45.99Proper ring gear spacing is critical for differential assembly—it ensures correct backlash and prevents premature gear wear that can compromise your entire drivetrain. This Allstar Performance spacer delivers the precision fit your GM 10-bolt...ALL70100- SKU:
- ALL70100
- Availability:
- Ships Same Business Day
- Weight:
- 2.08 LBS
- MFG Part #:
- ALL70100
$45.99 -
Allstar Performance Ring & Pinion Ford 9in 6.50 ALL70044
ALLSTAR PERFORMANCE
$169.99If you're running a Ford 9-inch rear end and want to dial in your final drive ratio for peak acceleration and top-end performance, a quality ring and pinion set is non-negotiable. The Allstar Performance 6.50 ratio delivers aggressive gear multiplication...ALL70044- SKU:
- ALL70044
- Availability:
- Ships Same Business Day
- Weight:
- 21.39 LBS
- MFG Part #:
- ALL70044
$169.99 -
Allstar Performance Ring & Pinion Ford 9in 6.33 ALL70042
ALLSTAR PERFORMANCE
$169.99A 6.33 ring and pinion ratio is engineered for high-RPM acceleration and sustained performance in competition environments where quick throttle response matters. This Allstar kit delivers the gearing precision required for track work, drag racing, or...ALL70042- SKU:
- ALL70042
- Availability:
- Ships Same Business Day
- Weight:
- 21.73 LBS
- MFG Part #:
- ALL70042
$169.99 -
Allstar Performance Ring & Pinion Ford 9in 6.20 ALL70040
ALLSTAR PERFORMANCE
$169.99A 6.20 ring and pinion ratio transforms your Ford 9-inch differential into a dedicated launch platform, delivering aggressive acceleration and quick off-the-line response for street, strip, or track applications. Whether you're building a bracket racer...ALL70040- SKU:
- ALL70040
- Availability:
- Ships Same Business Day
- Weight:
- 19.13 LBS
- MFG Part #:
- ALL70040
$169.99 -
Allstar Performance Ring & Pinion Ford 9in 6.00 ALL70038
ALLSTAR PERFORMANCE
$169.99A 6.00 ring and pinion ratio is the sweet spot for street performance—delivering stronger low-end torque multiplication without sacrificing highway cruising capability on your Ford 9-inch rear. Whether you're building a restomod, upgrading factory...ALL70038- SKU:
- ALL70038
- Availability:
- Ships Same Business Day
- Weight:
- 21.41 LBS
- MFG Part #:
- ALL70038
$169.99
