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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- Price
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PEM GM Metric New Stamped Floater Housing 60in Cen HNM300300
PEM
$690.99A precision-engineered rear axle housing built for serious racers and high-performance builds, the PEM GM Metric Stamped Floater Housing delivers the structural integrity and load capacity you need for extreme motorsports applications. The 60-inch...PEMHNM300300- SKU:
- PEMHNM300300
- Availability:
- Ships Same Business Day
- Weight:
- 55.00 LBS
$690.99 -
PEM New Stamped Floater Housing 58in Cent HN290290
PEM
$528.99A solid rear axle housing is the foundation of any high-performance 9-inch setup, and this PEM stamped floater design delivers the strength and geometry you need for consistent track performance. The 58-inch centered width provides optimal weight...PEMHN290290- SKU:
- PEMHN290290
- Availability:
- Ships Same Business Day
- Weight:
- 62.45 LBS
$528.99Qty in Cart: 0Quantity:Price:$528.99Subtotal: -
PEM 9in Gear Full Spool 6.33 Ratio New Center Section CSFS63331
PEM
$718.99A full spool differential eliminates wheel spin by locking both rear wheels together, delivering maximum traction off the line—essential for dedicated drag racing, street racing, and high-performance driving where consistency matters. The PEM 9in Gear...PEMCSFS63331- SKU:
- PEMCSFS63331
- Availability:
- Ships Same Business Day
- Weight:
- 70.00 LBS
$718.99Qty in Cart: 0Quantity:Price:$718.99Subtotal: -
PEM 9in Gear Full Spool 6.20 Ratio New Center Section CSFS62031
PEM
$718.99A 6.20 gear ratio spool is essential for high-horsepower applications where you need aggressive acceleration off the line without sacrificing drivability on the street. This PEM unit delivers the strength and precision demanded by serious racers and...PEMCSFS62031- SKU:
- PEMCSFS62031
- Availability:
- Ships Same Business Day
- Weight:
- 42.00 LBS
$718.99 -
PEM 9in Gear Full Spool 5.83 Ratio New Center Section CSFS58331
PEM
$718.99If you're serious about track performance or drag racing, you need a differential that can handle sustained power delivery without slipping. The PEM 9in Gear Full Spool delivers a locked-axle platform with a 5.83 ratio—ideal for acceleration-focused...PEMCSFS58331- SKU:
- PEMCSFS58331
- Availability:
- Ships Same Business Day
- Weight:
- 40.00 LBS
$718.99 -
PEM 9in Gear Full Spool 3.70 Ratio New Center 31 CSFS37031
PEM
$718.99A full spool differential eliminates wheel slip and ensures both rear wheels receive equal power delivery—essential for consistent traction during hard acceleration and cornering. The PEM 9in Gear Full Spool with its proven 3.70 ratio strikes the balance...PEMCSFS37031- SKU:
- PEMCSFS37031
- Availability:
- Ships Same Business Day
- Weight:
- 74.00 LBS
$718.99 -
Ford 8in Master Bearing Kit RA310RMK
MOTIVE GEAR
$145.99A worn or improperly set up Ford 8-inch differential will destroy performance and create costly failures—this master bearing kit gives you everything needed for a complete, factory-correct rebuild or upgrade. Whether you're refreshing a classic build or...MOTRA310RMK- SKU:
- MOTRA310RMK
- Availability:
- Ships Same Business Day
- Weight:
- 4.61 LBS
$145.99 -
GM 10 Bolt 8.6in Bearing Kit R10RLMK
MOTIVE GEAR
$148.99A quality differential installation requires precision-engineered bearings and properly matched components—this master kit eliminates guesswork by including everything you need for a complete, professional-grade rebuild. Whether you're refreshing worn...MOTR10RLMK- SKU:
- MOTR10RLMK
- Availability:
- Ships Same Business Day
- Weight:
- 6.04 LBS
$148.99 -
8.5 GM Master Bearing Kit R10REMK
MOTIVE GEAR
$118.99A properly installed differential is the foundation of reliable rear-end performance, and worn bearings or damaged crush sleeves will compromise handling and accelerate component wear. The 8.5 GM Master Bearing Kit R10REMK gives you everything needed for...MOTR10REMK- SKU:
- MOTR10REMK
- Availability:
- Ships Same Business Day
- Weight:
- 5.70 LBS
$118.99 -
Install Kit GM 8.5in Rearend Early GM8.5IK
MOTIVE GEAR
$61.99A complete differential installation kit is essential when rebuilding or servicing your GM 8.5-inch rearend—it ensures proper sealing, correct bearing preload, and reliable operation without leaks or premature wear. This kit consolidates all the...MOTGM8.5IK- SKU:
- MOTGM8.5IK
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
$61.99 -
Install Kit Ford 9in Rearend F9IK
MOTIVE GEAR
$49.99A properly installed differential is the foundation of reliable rear-end performance, and this Ford 9-inch install kit eliminates guesswork by providing all critical components in one package. Whether you're assembling a fresh rearend or refreshing an...MOTF9IK- SKU:
- MOTF9IK
- Availability:
- Ships Same Business Day
- Weight:
- 1.66 LBS
$49.99 -
Install Kit Ford 8.8in Rearend F8.8IK
MOTIVE GEAR
$52.99A properly installed Ford 8.8 differential requires precision assembly with OEM-spec components—this kit gives you everything needed to do it right the first time. Whether you're rebuilding a stock unit or upgrading to a performance diff, having the...MOTF8.8IK- SKU:
- MOTF8.8IK
- Availability:
- Ships Same Business Day
- Weight:
- 2.08 LBS
$52.99 -
Moser Engineering GM 10 Bolt 7.5 C-Clip 28 Spline Axles 28-7/16in A102810
MOSER ENGINEERING
$335.00If you're running a GM 10-bolt rear end and pushing power through the drivetrain, OEM axles won't cut it. Moser Engineering's 28-spline C-clip axles are engineered for durability and designed to handle the demands of street and track applications without...MEIA102810- SKU:
- MEIA102810
- Availability:
- Ships Same Business Day
- Weight:
- 30.95 LBS
$335.00 -
Moser Engineering GM 10-Bolt C-Clip Axles 28-Spline 30-5/16 (pair) A102804
MOSER ENGINEERING
$335.00If you're upgrading your third-member or replacing worn axle shafts in your 1982-92 Camaro, Moser Engineering's GM 10-Bolt C-Clip Axles deliver the strength and reliability you need for both street and strip duty. Built from high-grade steel with...MEIA102804- SKU:
- MEIA102804
- Availability:
- Ships Same Business Day
- Weight:
- 33.00 LBS
$335.00 -
Moser Engineering C-Clip Axle Set GM 28spl 10 Bolt 30-1/16 Long C/T A102803CT
MOSER ENGINEERING
$335.00If you're building or restoring a classic GM A-Body and need reliable, OEM-spec axle shafts, Moser Engineering's C-Clip Axle Set delivers the strength and precision fit your 10-bolt housing demands. These steel shafts are engineered to handle both street...MEIA102803CT- SKU:
- MEIA102803CT
- Availability:
- Ships Same Business Day
- Weight:
- 32.00 LBS
$335.00 -
Moser Engineering GM 10 Bolt 7.5 C-Clip 26 Spline Axles 28-7/16in A102601CT-4750
MOSER ENGINEERING
$335.00If you're running a GM 10-bolt rearend, axle shaft integrity is non-negotiable. Moser Engineering's 26-spline axles deliver the strength and reliability you need for sustained high-performance driving, whether you're on the strip, road course, or pushing...MEIA102601CT-4750- SKU:
- MEIA102601CT-4750
- Availability:
- Ships Same Business Day
- Weight:
- 30.55 LBS
$335.00Qty in Cart: 0Quantity:Price:$335.00Subtotal: -
Longacre Rear End Breather Kit 1-1/2in. Bar 52-22569
LONGACRE
$61.99Rear end breather systems prevent pressure buildup in your differential housing, which can force fluid past seals and cause leaks that compromise performance and longevity. The Longacre 52-22569 kit delivers a clean, effective solution with remote...LON52-22569- SKU:
- LON52-22569
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$61.99 -
Longacre Rear End Breather Kit 1.75in. Bar 52-22568
LONGACRE
$61.99Rear end breather kits prevent pressure buildup in your differential housing, which can compromise seal integrity and lead to fluid leakage under sustained racing conditions. The Longacre 52-22568 offers a clean, remote-mount solution that keeps your...LON52-22568- SKU:
- LON52-22568
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$61.99 -
Ring & Pinion Loaded 4.86 Ratio 2019 KTRP486
FRANKLAND RACING
$470.99A 4.86 ring and pinion ratio delivers the aggressive acceleration and gear multiplication you need for drag racing, circle track, or bracket racing competition. This loaded kit arrives pre-assembled and ready to install into your Frankland Superlite...FRKKTRP486- SKU:
- FRKKTRP486
- Availability:
- Ships Same Business Day
- Weight:
- 18.35 LBS
$470.99 -
DMI CT-1 GN Steel Tube 24in RRC-2285-24
DIVERSIFIED MACHINE
$157.99The DMI CT-1 GN Steel Tube is engineered for builders who demand precision-fit axle housing solutions without compromise. Whether you're constructing a custom rear axle assembly or repairing a worn tube on your race vehicle, this 24-inch seamless steel...DMIRRC-2285-24- SKU:
- DMIRRC-2285-24
- Availability:
- Ships Same Business Day
- Weight:
- 13.45 LBS
$157.99
