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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Gleason Torsen Diff QC w/Bearings KT0100
FRANKLAND RACING
$1,669.99A quality limited-slip differential is fundamental to consistent lap times and predictable handling under load. The Gleason Torsen diff delivers torque-biasing performance without the maintenance headaches of clutch-type units, while the quick-change...FRKKT0100- SKU:
- FRKKT0100
- Availability:
- Ships Same Business Day
- Weight:
- 27.48 LBS
- MFG Part #:
- KT0100
$1,669.99 -
Ford Performance Daytona-Style 9" Nodular Iron Pinion Bearing Retainer M-4614-B
FORD
$113.99If you're running a Ford 9-inch rear end under boost or in high-horsepower applications, pinion bearing support directly impacts both longevity and reliability. The Daytona-style design optimizes load distribution and oil flow to keep your pinion...FRDM4614-B- SKU:
- FRDM4614-B
- Availability:
- Ships Same Business Day
- Weight:
- 6.62 LBS
- MFG Part #:
- M-4614-B
$113.99 -
DMI 2Tuff Hollow 31 Spline Axle - 30.5in RRC-2300-30.5
DIVERSIFIED MACHINE
$239.99The DMI 2Tuff Hollow 31 Spline Axle is engineered for racers and serious off-road enthusiasts who demand reliability under extreme torque loads. This gun-drilled hollow design reduces unsprung weight while maintaining the strength needed for...DMIRRC-2300-30.5- SKU:
- DMIRRC-2300-30.5
- Availability:
- Ships Same Business Day
- Weight:
- 7.20 LBS
- MFG Part #:
- RRC-2300-30.5
$239.99 -
DMI 4.12 Ring & Pinion RRC-1300
DIVERSIFIED MACHINE
$489.99The DMI 4.12 Ring & Pinion RRC-1300 delivers the gear ratio your high-RPM applications demand, whether you're chasing consistent ET times or maximizing acceleration off the line. A 4.12 ratio strikes the critical balance between quick spool-up and...DMIRRC-1300- SKU:
- DMIRRC-1300
- Availability:
- Ships Same Business Day
- Weight:
- 14.29 LBS
- MFG Part #:
- RRC-1300
$489.99 -
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
$43.99Qty in Cart: 0Quantity:Price:$43.99Subtotal: -
DMI CT1 Aluminum Spool RRC-1270
DIVERSIFIED MACHINE
$408.99A quality spool is the backbone of any reliable quick-change rear end system. The DMI CT1 Aluminum Spool delivers the strength and precision needed for consistent power transfer during high-load racing conditions, while keeping rotational mass minimal...DMIRRC-1270- SKU:
- DMIRRC-1270
- Availability:
- Ships Same Business Day
- Weight:
- 5.87 LBS
- MFG Part #:
- RRC-1270
$408.99 -
Detroit Locker - Ford 9in 31-Spline Center R18703A
DETROIT LOCKER-TRACTECH
$964.99A quality differential locker is essential for consistent traction on the track—whether you're drag racing, circle tracking, or pushing hard in competition. The Detroit Locker delivers mechanical lock-up that keeps both rear wheels turning at the same...DETR18703A- SKU:
- DETR18703A
- Availability:
- Ships Same Business Day
- Weight:
- 16.20 LBS
- MFG Part #:
- R18703A
$964.99 -
Detroit Truetrac - Ford 8in 28-Spline 912A616
DETROIT LOCKER-TRACTECH
$814.99The Detroit Truetrac limited-slip differential is engineered to maximize traction and cornering performance on both street and track applications. Unlike open differentials, the Truetrac's helical gear design provides automatic load-biasing without...DET912A616- SKU:
- DET912A616
- Availability:
- Ships Same Business Day
- Weight:
- 16.60 LBS
- MFG Part #:
- 912A616
$814.99 -
Detroit Truetrac - Ford 9in 28-Spline 912A587
DETROIT LOCKER-TRACTECH
$685.99The Detroit Truetrac is a helical limited-slip differential that delivers consistent, predictable power delivery to both rear wheels without the maintenance demands of clutch-type units. If you're running a Ford 9-inch rear and need reliable traction...DET912A587- SKU:
- DET912A587
- Availability:
- Ships Same Business Day
- Weight:
- 16.46 LBS
- MFG Part #:
- 912A587
$685.99 -
Detroit Truetrac - GM 7.625 10-Bolt 912A317
DETROIT LOCKER-TRACTECH
$642.99A quality limited-slip differential is essential for consistent power delivery and predictable handling on track or strip. The Detroit Truetrac uses helical gear design to automatically bias torque to the wheel with more traction, eliminating the...DET912A317- SKU:
- DET912A317
- Availability:
- Ships Same Business Day
- Weight:
- 20.57 LBS
- MFG Part #:
- 912A317
$642.99 -
Detroit Truetrac - GM 7.5 26-Spline 911A415
DETROIT LOCKER-TRACTECH
$659.99The Detroit Truetrac is a helical-gear limited-slip differential that delivers consistent power to both wheels without the maintenance headaches of clutch-pack designs. If you're running a GM 7.5 rear and want predictable traction during acceleration and...DET911A415- SKU:
- DET911A415
- Availability:
- Ships Same Business Day
- Weight:
- 20.88 LBS
- MFG Part #:
- 911A415
$659.99 -
Detroit Truetrac - GM 7.5 26-Spline 911A319
DETROIT LOCKER-TRACTECH
$653.99The Detroit Truetrac is a helical-gear limited-slip differential that delivers predictable power distribution without the maintenance headaches of clutch-type designs. If you're running a GM 7.5 rear and need confident cornering grip with straight-line...DET911A319- SKU:
- DET911A319
- Availability:
- Ships Same Business Day
- Weight:
- 20.69 LBS
- MFG Part #:
- 911A319
$653.99 -
Eaton Posi - GM 7.5 10-Bolt 26-Spline 19663-010
DETROIT LOCKER-TRACTECH
$696.99If you're running a GM 7.5 10-bolt and need predictable traction without the complexity of electronic controls, the Eaton Posi differential carrier is the proven choice for street and track use. This unit delivers consistent power distribution to both...DET19663-010- SKU:
- DET19663-010
- Availability:
- Ships Same Business Day
- Weight:
- 17.13 LBS
- MFG Part #:
- 19663-010
$696.99 -
Eaton Posi - GM 10-Bolt 64-82 8.2in 19603-010
DETROIT LOCKER-TRACTECH
$750.99If you're running a classic Chevy with a 10-bolt and need predictable, straight-line traction without the chatter and slip of an open diff, the Eaton Posi is your answer. This limited-slip carrier locks both wheels under load, giving you the grip you...DET19603-010- SKU:
- DET19603-010
- Availability:
- Ships Same Business Day
- Weight:
- 20.25 LBS
- MFG Part #:
- 19603-010
$750.99Qty in Cart: 0Quantity:Price:$750.99Subtotal: -
Coleman Steel Spool GM 7.5in Thick Ring Gear 22545
COLEMAN MACHINE
$589.99A spool eliminates side-to-side wheel slip, delivering maximum traction and consistent power delivery under hard acceleration. If you're running a dedicated track car or drag setup on a GM 10-bolt, this Coleman steel spool provides the rigid lockup you...COL22545- SKU:
- COL22545
- Availability:
- Ships Same Business Day
- Weight:
- 11.15 LBS
- MFG Part #:
- 22545
$589.99Qty in Cart: 0Quantity:Price:$589.99Subtotal: -
Coleman Steel Drive Flange 5x5/ 5x4-3/4 5/8in Studs 21632
COLEMAN MACHINE
$174.99A quality drive flange is critical for transferring power reliably to your wheels without slippage or failure. The Coleman Steel Drive Flange 21632 delivers a bolt-on solution that accommodates dual bolt patterns, making it ideal for builds requiring...COL21632- SKU:
- COL21632
- Availability:
- Ships Same Business Day
- Weight:
- 3.36 LBS
- MFG Part #:
- 21632
$174.99 -
BSB Clamp Bracket Double Sided 7326
BSB MANUFACTURING
$107.99Precise suspension geometry depends on reliable, repeatable link clamp systems—and the BSB Clamp Bracket Double Sided delivers the rigidity and alignment stability your setup demands. Whether you're fine-tuning a road course car or locking in your drag...BSB7326- SKU:
- BSB7326
- Availability:
- Ships Same Business Day
- Weight:
- 6.19 LBS
- MFG Part #:
- 7326
$107.99 -
Allstar Performance Axle Spacer Plate 9in Ford Big Early ALL72319
ALLSTAR PERFORMANCE
$9.99If you're running an early Ford 9-inch differential, axle spacing is critical to proper gear mesh, bearing preload, and overall drivetrain longevity. This Allstar Performance spacer plate ensures precise positioning of your axle assembly, preventing the...ALL72319- SKU:
- ALL72319
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- MFG Part #:
- ALL72319
$9.99 -
Allstar Performance Axle Spacer Plate 9in Ford Big Late ALL72318
ALLSTAR PERFORMANCE
$9.99Proper axle spacing is critical for eliminating bind, reducing wear on carrier bearings, and maintaining consistent gear mesh in your 9-inch Ford rear end. This Allstar Performance spacer plate ensures precise geometry during assembly and is essential...ALL72318- SKU:
- ALL72318
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MFG Part #:
- ALL72318
$9.99 -
Allstar Performance Axle Retainer 9in Big Early Steel 3/16in Thick ALL72317
ALLSTAR PERFORMANCE
$15.49If you're running an early Ford 9-inch with large bearings, axle retention isn't something to improvise. This Allstar Performance retainer plate locks your axle securely in place without the hassle of bearing removal—keeping your drivetrain solid whether...ALL72317- SKU:
- ALL72317
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- MFG Part #:
- ALL72317
$15.49
