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!
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- Qty in Cart
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- Price
- Subtotal
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PEM Ring and Pinion 650 Ratio LW Xtreme PG Ford PGF9/650LW
PEM
$227.99If you're running a Ford 9-inch rear end and need aggressive acceleration without sacrificing efficiency, the PEM Ring and Pinion 650 Ratio LW Xtreme is engineered to deliver. This lightweight, CNC-precision gearset reduces rotational mass while...PEMPGF9/650LW- SKU:
- PEMPGF9/650LW
- Availability:
- Ships Same Business Day
- Weight:
- 17.00 LBS
$227.99 -
PEM New Floater Housing Kit 61in Centered 5x5 HNK3053055
PEM
$1,169.99A quality floater housing is the foundation of any serious Ford 9-inch rear axle setup, and this PEM kit delivers the structural integrity and precision fitment your build demands. With a centered 5x5 hub configuration and 61-inch width, you're getting a...PEMHNK3053055- SKU:
- PEMHNK3053055
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$1,169.99 -
PEM New Floater Housing 62in Centered HN310310
PEM
$553.99A solid rear axle housing is the foundation of any reliable high-performance drivetrain, and the PEM New Floater Housing delivers the strength and precision required for serious racing applications. This 62-inch centered floater design distributes loads...PEMHN310310- SKU:
- PEMHN310310
- Availability:
- Ships Same Business Day
- Weight:
- 55.00 LBS
$553.99 -
PEM Ring And Pinion 583 Ratio Lightened F9583LW
PEM
$230.99A 5.83 ratio ring and pinion gear set demands precision engineering—especially when you're running a Ford 9-inch and every tenth of a pound matters on the track. The PEM F9583LW delivers the gear ratio you need for aggressive acceleration while shedding...PEMF9583LW- SKU:
- PEMF9583LW
- Availability:
- Ships Same Business Day
- Weight:
- 21.00 LBS
$230.99 -
PEM New Center Section FS 7.00 Ratio 31 Spline L/W CSFS70031LW
PEM
$876.99A 7.00 ratio center section transforms your Ford 9-inch differential into a precision tool for high-RPM acceleration and track performance. Whether you're building a dedicated drag setup or maximizing mid-range punch on the strip, this PEM spool delivers...PEMCSFS70031LW- SKU:
- PEMCSFS70031LW
- Availability:
- Ships Same Business Day
- Weight:
- 75.00 LBS
$876.99 -
PEM New Center Section FS 6.83 Ratio 31 Spline L/W CSFS68331LW
PEM
$876.99If you're building a dedicated drag or road-race Ford 9-inch, the PEM center section delivers the gear ratio and lockup characteristics you need for consistent power delivery off the line. This 6.83 ratio spool is engineered for vehicles that demand...PEMCSFS68331LW- SKU:
- PEMCSFS68331LW
- Availability:
- Ships Same Business Day
- Weight:
- 7.00 LBS
$876.99 -
PEM New Center Section FS 6.66 Ratio 31 Spline L/W CSFS66631LW
PEM
$876.99If you're building a high-rpm Ford 9-inch rear end that demands immediate power delivery without hesitation, the PEM New Center Section FS 6.66 Ratio is engineered to eliminate wheel spin and keep both tires driving hard through the corner. The 6.66 gear...PEMCSFS66631LW- SKU:
- PEMCSFS66631LW
- Availability:
- Ships Same Business Day
- Weight:
- 75.00 LBS
$876.99 -
PEM New Center Section FS LW 650 Ratio 31 Spline CSFS65031LW
PEM
$774.83A 6.50 ratio differential is essential for high-RPM acceleration and consistent power delivery on the track or strip. The PEM center section delivers the mechanical lock and durability required for serious racing, eliminating wheel hop and ensuring both...PEMCSFS65031LW- SKU:
- PEMCSFS65031LW
- Availability:
- Ships Same Business Day
- Weight:
- 75.00 LBS
$774.83Qty in Cart: 0Quantity:Price:$774.83Subtotal: -
PEM New Center Section FS LW 583 Ratio 31 Spline CSFS58331LW
PEM
$768.12A locked differential is essential for serious drag racing and off-road performance, and the PEM New Center Section FS LW delivers uncompromising power transfer without the complexity of electronic systems. The 5.83 ratio is engineered for aggressive...PEMCSFS58331LW- SKU:
- PEMCSFS58331LW
- Availability:
- Ships Same Business Day
- Weight:
- 75.00 LBS
$768.12 -
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 -
BK FORD 8.8in 81-10 R8.8RMKT
MOTIVE GEAR
$140.99A Ford 8.8-inch differential rebuild requires precision components that work together seamlessly—this master installation kit includes everything you need to properly set bearing preload, backlash, and crush sleeve specifications without guesswork...MOTR8.8RMKT- SKU:
- MOTR8.8RMKT
- Availability:
- Ships Same Business Day
- Weight:
- 5.80 LBS
$140.99 -
Master Install Kit 8.5in w/Eaton or Auburn Unit R10REMKT
MOTIVE GEAR
$169.99Rebuilding or servicing a differential demands precision—and this master install kit eliminates guesswork by bundling every component you need to properly assemble an 8.5-inch GM 10-bolt differential. Whether you're refreshing worn bearings, installing a...MOTR10REMKT- SKU:
- MOTR10REMKT
- Availability:
- Ships Same Business Day
- Weight:
- 5.65 LBS
$169.99 -
Rear Diff Fill Tank 12an w/Vented Cap KR9090-12V
KEVKO OIL PANS & COMPONENTS
$109.99Maintaining proper differential fluid levels is critical for gear longevity and consistent performance under load—but accessing your diff fill port shouldn't require dropping the entire rear end. This remote fill tank eliminates guesswork and keeps your...KEVKR9090-12V- SKU:
- KEVKR9090-12V
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$109.99 -
Rear Diff Fill Tank 10an w/Vented Cap KR9090-10V
KEVKO OIL PANS & COMPONENTS
$109.99Keeping differential fluid at the correct level is critical to protecting your rear end under extreme load and heat. This vented fill tank eliminates guesswork during maintenance and track sessions, giving you reliable access to top off your diff without...KEVKR9090-10V- SKU:
- KEVKR9090-10V
- Availability:
- Ships Same Business Day
- Weight:
- 1.13 LBS
$109.99 -
Joes Drive Flange 5 x 5 Steel 25045
JOES RACING PRODUCTS
$139.95A quality drive flange is the foundation of reliable wheel attachment—it directly impacts load transfer, runout concentricity, and overall drivetrain integrity. The Joe's Drive Flange 5x5 delivers precision engineering in a bolt-on package, designed for...JOE25045- SKU:
- JOE25045
- Availability:
- Ships Same Business Day
- Weight:
- 2.46 LBS
$139.95 -
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 -
Allstar Performance Fill Line Kit ALL36148
ALLSTAR PERFORMANCE
$81.99A properly sealed fuel cell fill system is critical for safe, reliable racing—especially when you're running pressurized fuel systems or competing in sanctioned events. This Allstar Performance kit eliminates guesswork with pre-assembled,...ALL36148- SKU:
- ALL36148
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
$81.99 -
Winters Ring & Pinion 4.11 8" Second Gen Short with Bearings WIN65411SB-CT
WINTERS
$913.99If you're running a Winters 12-Bolt Quick Change rear end in competitive racing, your gear ratio directly determines acceleration, top-end speed, and overall track performance. The 4.11 ratio in this ring and pinion set delivers aggressive acceleration...WIN65411SB-CT- SKU:
- WIN65411SB-CT
- Availability:
- Ships Same Business Day
- Weight:
- 16.25 LBS
$913.99 -
Winters Solid Axle 33-1/2 in 31 Spline Carrier 24 Spline Drive Flange Steel Natural WIN5067-33.500
WINTERS
$118.99If you're building or maintaining a race car, axle shaft integrity directly impacts your lap times and safety. The Winters Solid Axle delivers the spline configuration and robust steel construction needed to handle repeated high-load cycles without...WIN5067-33.500- SKU:
- WIN5067-33.500
- Availability:
- Ships Same Business Day
- Weight:
- 12.00 LBS
$118.99Qty in Cart: 0Quantity:Price:$118.99Subtotal: -
Winters Solid Axle 32-1/2 in 31 Spline Carrier 24 Spline Drive Flange Steel Natural WIN5067-32.500
WINTERS
$118.99When you're running a solid axle setup, your axle shafts are critical load-bearing components that directly impact handling precision and reliability under hard cornering and acceleration. The Winters 32-1/2 inch solid axle delivers the strength and...WIN5067-32.500- SKU:
- WIN5067-32.500
- Availability:
- Ships Same Business Day
- Weight:
- 11.26 LBS
$118.99Qty in Cart: 0Quantity:Price:$118.99Subtotal:
