Drivetrain
Circle Track Drivetrain Parts: Transmissions, Clutches & Shifters for IMCA Racing at JJ Motorsports
Transfer power efficiently in your circle track racer with premium drivetrain components from JJ Motorsports. Our selection includes transmissions, clutches, shifters, differentials, bellhousings, and more, designed for superior performance, durability, and quick shifts in late models, modifieds, street stocks, and IMCA dirt racing. These high-quality parts ensure reliable power delivery and endurance under competitive track conditions.
Shop trusted brands like Winters Performance and Maxima Racing Oils. Explore related categories such as circle track chassis components for frame upgrades or circle track brakes for stopping power.
Top Circle Track Drivetrain Products
- Winters Falcon LM Transmission 2-Speed Manual Aluminum Case 18 Spline Input WIN60100 – High-performance 2-speed manual transmission for late model racing, with aluminum case, internal hydraulic clutch, IMCA approved for Stock Car, Modified, and Late Model classes; includes crankshaft coupler, 2.4:1 low gear, 1:1 high, reverse, 18 spline input, 27 spline output, 21-5/8" length, and 43 lbs weight.
- 2-Lever Floor Mount Shifter Assembly - Black Aluminum for IMCA UMP Racing – Durable shifter for IMCA and UMP racing, made from high-quality aluminum with black anodized finish; weighs 2 lbs, includes hardware for quick installation, and offers universal fit for efficient gear changes.
- Chevy Clutch Hydraulic Release Throwout Bearing Kit - Racing – Upgrades drivetrain with easy installation; includes hydraulic release bearing, CNC-machined housing, anti-rotation studs, adjusting lock nuts, AN Teflon-lined hose, and adapter fittings; compatible with Chevrolet, BOP, GMC manual transmissions and 5.5-7.25" racing clutches; features fail-safe design and lower pedal effort.
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 Differential Shim Kit for Ford 8" Axle ALL68639
ALLSTAR PERFORMANCE
$37.99Proper differential setup is critical to reliability and performance, and getting pinion depth and bearing preload wrong will result in premature failure or catastrophic damage. This Allstar...ALL68639- SKU:
- ALL68639
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- MFG Part #:
- ALL68639
$37.99 -
Allstar Performance Shim Kit for Mopar 8-3/4 with 742 Casting 1.796" I.D. Carrier Bearings ALL68637
ALLSTAR PERFORMANCE
$59.99If you're rebuilding or servicing a Mopar 8-3/4 differential with a 742 casting, proper pinion depth and bearing preload are non-negotiable—get them wrong and you're looking at premature wear, noise,...ALL68637- SKU:
- ALL68637
- Availability:
- Ships Same Business Day
- Weight:
- 1.62 LBS
- MFG Part #:
- ALL68637
$59.99 -
Allstar Performance Shim Kit for Dana 60 and 61 Axles 1966-1998 ALL68634
ALLSTAR PERFORMANCE
$61.99Proper ring and pinion setup is critical to differential longevity and performance. Incorrect shimming leads to premature wear, noise, and potential failure under load. This Allstar Performance Shim...ALL68634- SKU:
- ALL68634
- Availability:
- Ships Same Business Day
- Weight:
- 2.22 LBS
- MFG Part #:
- ALL68634
$61.99Qty in Cart: 0Quantity:Price:$61.99Subtotal: -
Allstar Performance Shim Kit Dana 44 1967-1997 ALL68633
ALLSTAR PERFORMANCE
$39.99Dana 44 differentials demand precision shimming to maintain proper bearing preload and minimize backlash—critical factors that directly impact handling response, tire wear, and drivetrain longevity...ALL68633- SKU:
- ALL68633
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- MFG Part #:
- ALL68633
$39.99 -
Allstar Performance Shim Kit for Mopar 8-3/4 489 Case ALL68631
ALLSTAR PERFORMANCE
$54.99Setting up a Mopar 8-3/4 rear axle requires precise shimming and pre-load adjustment—tasks that demand the right components and zero guesswork. This Allstar Performance Shim Kit eliminates the...ALL68631- SKU:
- ALL68631
- Availability:
- Ships Same Business Day
- Weight:
- 2.13 LBS
- MFG Part #:
- ALL68631
$54.99 -
Allstar Performance Shim Kit GM 8.2in 10 Bolt 1964-72 ALL68622
ALLSTAR PERFORMANCE
$47.99Proper pinion depth and gear preload are critical to differential longevity and performance—incorrect setup leads to premature wear, noise, and catastrophic failure. This complete shim kit gives you...ALL68622- SKU:
- ALL68622
- Availability:
- Ships Same Business Day
- Weight:
- 1.88 LBS
- MFG Part #:
- ALL68622
$47.99 -
Allstar Performance Shim Kit GM 8.5in 10 Bolt 1970-98 ALL68621
ALLSTAR PERFORMANCE
$43.99Proper differential setup is critical for consistent performance and longevity, especially in high-stress racing applications. This comprehensive shim kit gives you the precision adjustment needed to...ALL68621- SKU:
- ALL68621
- Availability:
- Ships Same Business Day
- Weight:
- 2.07 LBS
- MFG Part #:
- ALL68621
$43.99 -
Allstar Performance Shim Kit for GM 8.875" 12-Bolt Passenger Car Axle ALL68619
ALLSTAR PERFORMANCE
$47.99Proper differential assembly is critical for maintaining driveline integrity and consistent performance under load. This comprehensive shim kit eliminates guesswork by providing all necessary...ALL68619- SKU:
- ALL68619
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- MFG Part #:
- ALL68619
$47.99 -
Allstar Performance Differential Shim Kit for GM 8.875in 12-Bolt Truck ALL68618
ALLSTAR PERFORMANCE
$49.99A properly shimmed and assembled differential is critical to reducing backlash, maintaining gear alignment, and preventing premature wear in your GM 12-bolt truck rear end. This Allstar Performance...ALL68618- SKU:
- ALL68618
- Availability:
- Ships Same Business Day
- Weight:
- 2.21 LBS
- MFG Part #:
- ALL68618
$49.99 -
Allstar Performance Shim Kit GM 7.5in 10 Bolt 1982-1998 ALL68615
ALLSTAR PERFORMANCE
$43.99Proper pinion depth and bearing preload are critical to differential longevity and performance—improper setup leads to premature wear, noise, and catastrophic failure. This complete shim kit...ALL68615- SKU:
- ALL68615
- Availability:
- Ships Same Business Day
- Weight:
- 1.79 LBS
- MFG Part #:
- ALL68615
$43.99 -
Allstar Performance Shim Kit Ford 9in with Crush Sleeve ALL68611
ALLSTAR PERFORMANCE
$32.99Proper pinion preload and differential setup are critical for Ford 9-inch rear end reliability and performance—improper shimming leads to premature wear, noise, and catastrophic failure. The Allstar...ALL68611- SKU:
- ALL68611
- Availability:
- Ships Same Business Day
- Weight:
- 1.68 LBS
- MFG Part #:
- ALL68611
$32.99 -
Allstar Performance Shim Kit Ford 9in with Solid Spacer ALL68610
ALLSTAR PERFORMANCE
$41.99Proper pinion depth and gear preload are critical to Ford 9-inch differential performance and longevity. This Allstar shim kit gives you the precision adjustment tools needed to dial in exact bearing...ALL68610- SKU:
- ALL68610
- Availability:
- Ships Same Business Day
- Weight:
- 1.74 LBS
- MFG Part #:
- ALL68610
$41.99 -
Allstar Performance Bearing Kit for Ford 9" 3.250" Carrier Bearing with Daytona 28-Spline Pinion Support and Solid Spacer ALL68543
ALLSTAR PERFORMANCE
$129.99A Ford 9-inch rear end is only as reliable as its differential assembly, and this Allstar Performance bearing kit eliminates guesswork by providing every component you need in one package. Whether...ALL68543- SKU:
- ALL68543
- Availability:
- Ships Same Business Day
- Weight:
- 6.08 LBS
- MFG Part #:
- ALL68543
$129.99 -
Allstar Performance Bearing Kit for Ford 9in 3.250 Carrier Bearing 28-Spline Pinion Support ALL68542
ALLSTAR PERFORMANCE
$119.99If you're running a Ford 9-inch rear axle at the track or in serious street duty, the integrity of your carrier and pinion support directly impacts both performance and reliability. This Allstar...ALL68542- SKU:
- ALL68542
- Availability:
- Ships Same Business Day
- Weight:
- 6.03 LBS
- MFG Part #:
- ALL68542
$119.99Qty in Cart: 0Quantity:Price:$119.99Subtotal: -
Allstar Performance Bearing Kit for Ford 9in 3.250 Carrier Bearing with 35-Spline Pinion Support ALL68541
ALLSTAR PERFORMANCE
$142.99A properly spec'd bearing kit is non-negotiable when rebuilding a Ford 9-inch differential—cheap or incomplete kits lead to premature wear, noise, and catastrophic failure under boost or sustained...ALL68541- SKU:
- ALL68541
- Availability:
- Ships Same Business Day
- Weight:
- 5.84 LBS
- MFG Part #:
- ALL68541
$142.99 -
Allstar Performance Bearing Kit for Ford 9" 3.250" Carrier Bearing with MW or Strange 28-Spline Pinion Support No Spacer or Crush Sleeve ALL68540
ALLSTAR PERFORMANCE
$129.99If you're running a Ford 9-inch rear axle with a MW or Strange 28-spline pinion support, this Allstar Performance Bearing Kit is essential for maintaining precise carrier geometry and supporting...ALL68540- SKU:
- ALL68540
- Availability:
- Ships Same Business Day
- Weight:
- 5.85 LBS
- MFG Part #:
- ALL68540
$129.99 -
Allstar Performance Bearing Kit Ford 9in 3.062 Bearing ALL68539
ALLSTAR PERFORMANCE
$129.99A complete differential bearing installation demands precision components and proper spacing to ensure longevity and consistent performance under load. This Allstar Performance kit consolidates...ALL68539- SKU:
- ALL68539
- Availability:
- Ships Same Business Day
- Weight:
- 5.88 LBS
- MFG Part #:
- ALL68539
$129.99 -
Allstar Performance Bearing Kit Ford 9in 3.062 Bearing ALL68538
ALLSTAR PERFORMANCE
$118.99A quality differential bearing installation requires precision components and proper assembly—cutting corners here leads to premature wear, noise, and catastrophic failure. The Allstar Performance...ALL68538- SKU:
- ALL68538
- Availability:
- Ships Same Business Day
- Weight:
- 5.93 LBS
- MFG Part #:
- ALL68538
$118.99 -
Allstar Performance Bearing Kit for Mopar 8-3/4" with 742 Casting ALL68537
ALLSTAR PERFORMANCE
$144.99A worn or improperly assembled differential bearing kit will introduce play, noise, and premature wear to your Mopar 8-3/4" rear axle—ultimately compromising handling and reliability. The Allstar...ALL68537- SKU:
- ALL68537
- Availability:
- Ships Same Business Day
- Weight:
- 7.29 LBS
- MFG Part #:
- ALL68537
$144.99 -
Allstar Performance Bearing Kit for Dana 60 and 61 9.75-inch Axles ALL68534
ALLSTAR PERFORMANCE
$167.99A quality differential bearing kit is non-negotiable for Dana 60 and 61 axle rebuilds—it ensures proper preload, eliminates backlash, and extends gear life under sustained racing loads. This...ALL68534- SKU:
- ALL68534
- Availability:
- Ships Same Business Day
- Weight:
- 8.43 LBS
- MFG Part #:
- ALL68534
$167.99
