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Performance & Replacement Transmission & Drivetrain Parts
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
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TCI Forged Flexplates
Whether you need stock, stamped, or heavy-duty, TCI forged flexplates are your performance solution. TCI offers popular Chrysler, Ford, and Chevy applications. Their forged selection for Chrysler includes special counterbalanced flexplates for neutral balance torque converters in cast crank applications that came with a counterbalanced torque converter. For Ford applications, TCI offers OEM-style small block plates built to precise standards with extra-thick welds to retain starter ring gear, and they are precision-balanced. Their Chevy stamped flexplates are built thicker than stock from high-tensile strength materials with extra welding to help retain the starter ring gear, and to withstand the stress of high-rpm engines and high-stall converters. For high performance, buzzing around at high rpm requires the confidence of TCI forged flexplates.
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$67.95
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$586.95
Inland Empire Driveline Forged Steel Pinion Yokes
If you're looking for a high-strength, top-quality pinion yoke for your application, look no further than Inland Empire Driveline forged steel pinion yokes. They have such great features as: * Forged for maximum strength * Precision-machined * Heat-treated for toughness * U-bolt style joint retainers * Available for a variety of applications
( 14 )
$113.03
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$174.35
Wilwood Forged Billet Aluminum Brake Hub Assemblies
If you've had a Wilwood front disc brake kit on your ride for a while and notice the effects of worn-out hubs, the complete solution is at your fingertips. These replacement forged billet aluminum brake hub assemblies are made from premium-grade alloy, crafted into shape under high heat and pressure, and then CNC-machined for a precise fit on each vehicle application. Wilwood brake hub assemblies are available for a variety of spindle types and rotor styles, and some packages include new bearing races and aluminum caps.
( 20 )
$141.10
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$199.32
TCI Forged Steel Clutch Hubs
TCI forged steel clutch hubs feature a CNC-machined 4140 steel forging. The all-new construction is much stronger than the cast OE unit and will resist fracturing, clutch tooth wear and spline failures. Designed for 500 hp plus TH400/4L80E transmission applications, the TCI's forged steel clutch hubs are the perfect remedy to avoid clutch hub failure.
( 5 )
$136.95
BBR Motorsports Forged Output Shafts with 1st Gear
BBR Motorsports forged output shafts with 1st gear are developed for the BBR race team. These forged shafts are the strongest available on the market. They are must-haves for high-horsepower motors. They come with a forged, high-strength 1st gear and the end oiling-hole has been eliminated. The shaft is grooved for the proper oiling of 1st gear; 1st gear also rides on a bushing. They install like OEM parts.
Not Yet Reviewed
$205.95
Wilwood Forged Billet Aluminum Vented Rotor Offset Hubs
Wilwood forged billet aluminum vented rotor offset hubs are made from premium grade alloy billets shaped under high heat and pressure, then CNC machined for a precise fit on each spindle application. Intended for use with intermediate adapter plates, but they can also be used with aluminum mounting hats for custom applications. Hubs are available in multiple wheel lug patterns (depending on part number) and include bearing races. Some Wilwood forged billet aluminum vented rotor offset hubs include screw-on aluminum caps, while others use a press-on steel cap available separately. Select the correct fit for your vehicle's setup.
Not Yet Reviewed
$158.74
Wilwood Forged Billet Hat Mount Hubs
Wilwood forged billet hat mount hubs are made from premium grade alloy billets, forged into shape under high-heat and pressure, then CNC-machined for precise fit on each spindle application. Intended for use with aluminum mounting hats, hubs include bearing races and screw-on aluminum caps.
Not Yet Reviewed
$167.56
On Sale
Competition Engineering Forged Rear Axle Housing Ends
Whether narrowing a rear axle housing for bigger tires or just building a new housing for your street car, you will need housing ends to complete the project. You could re-use the old housing ends but most of the time they are either too rusty or damaged from the removal process. Competition Engineering's Forged Rear Housing Ends are offered in five popular styles, each CAD designed to ensure a proper fit. They are forged from mild steel to allow for ease of welding and then fully machined on CNC equipment. A black oxide coating protects them from rust and allows them to be welded without major grinding.
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$146.99
$132.29
Sonnax Clutch Hubs
Many Sonnax clutch hubs are designed for the extra-duty requirements of drag racing with Powerglide and other GM transmissions, for instance. Machined from a high-quality medium carbon steel forging, most hubs will accept five friction discs for the added load capacity needed in high horsepower race cars. All splines and thrust surfaces are precision-machined to exacting tolerances, and the unique lube hole pattern is designed to reduce drag on the friction discs in low gear. Sonnax clutch hubs are also available with or without lightening holes to reduce rotational weight.
( 16 )
$37.80
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$239.99
Moser Engineering Rear Axle Housing Ends
Whether narrowing a rear axle housing for bigger tires or just building a new housing for your street car, you will need housing ends to complete the project. Moser Engineering rear housing ends are offered in five popular styles, each CAD-designed to ensure a proper fit. They are forged from mild steel for ease of welding and then fully machined on CNC equipment.
( 58 )
$130.00
Strange Chromoly Pinion Yokes
To complete the drivetrain, use one of these Strange Engineering chromoly yokes. They will endure the brunt of the abuse in the drivetrain.
( 47 )
$144.99
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$154.99
FTI Performance Powerglide Input Shafts
FTI Performance offers options for Powerglide input shafts. Their selection allows you to choose the strength and pricing to fit your horsepower and budget. From forged 4340 steel to forged 300M to CNC-machined ER100 that is virtually unbreakable, FTI Performance delivers the level of performance you want and need with their variety of Powerglide input shafts.
( 7 )
$149.00
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$599.00
ATI Output Shafts
ATI output shafts offer heavy-duty performance for high horsepower. The 300M shafts feature an extended bearing surface and are gundrilled to save weight with no governor or speedometer support. They are available in three lengths for different applications. Big power, lots of weight, giant slicks, and a numerically low rear gear signals the necessity for ATI output shafts--they're must-haves for high performance.
( 5 )
$159.00
Sonnax Heavy-Duty Automatic Transmission Clutch Hubs
Sonnax heavy-duty automatic transmission clutch hubs eliminate hub failure. These overrun clutch hubs feature high-strength steel and thicker material for trouble-free performance when applying deceleration engine braking in D3, D2, or D1 ranges. Ready your transmission for high performance applications, such as autocross, with Sonnax heavy-duty clutch hubs. Additional info: * Two times thicker than OE clutch hubs to prevent cracking and breaking in critical areas that engage the input sprag inner race * Manufactured from high-strength 4140 chromoly steel
( 2 )
$281.31
Sonnax Slip Yokes
Sonnax slip yokes are forged, not cast, for greater strength, and they undergo a precision-machining process to guarantee exceptional balance and minimal runout. They are 100 percent leak-tested, the seal plug is O.D. ground for superior seal, and yokes are air-tested to 40 psi. Sonnax slip yokes are available in different lengths and tooth counts to fit your specific transmission application.
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$165.69
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$339.72
ACT Prolite Xact Flywheels
ACT Prolite Xact flywheels provide a quicker throttle response and improved acceleration. They're CAD-designed, CNC-machined, and computer-balanced for quality and precision. The manufacturing process includes chromoly forgings with induction-hardened integral ring gears for maximum life. Prolite Xact flywheels are stronger and more durable than billet steel, aluminum, or cast iron! Dozens of models are available—order the one designed for your vehicle. More product features include: * Smooth operation at all RPMs * Optimal mass distribution * Lead-in chamfers * Heat-treated and tempered
( 42 )
$291.00
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$766.00
Yukon Gear & Axle Differential Pinion Yokes
Yukon Gear & Axle differential pinion yokes offer precise fit and strength for many applications. The yokes are manufactured from cast steel, forged steel, billet steel, and aluminum—and are available for fitment on dozens of specific axle applications. Choose the high performance strength of Yukon Gear & Axle differential pinion yokes for your build.
( 87 )
$52.99
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$601.99
Competition Clutch Lightweight Flywheels
Competition Clutch steel flywheels are made of 4140 forged steel and are one-piece designs, which helps significantly in reducing the chances of ring gear separation and friction surface warpage. Forged steel flywheels work with all performance and stock clutch assemblies, and can be resurfaced. Competition Clutch lightweight steel flywheels are recommended for naturally aspirated and/or street driven applications. They preserve low-end torque and drivability, and are well suited for Gravity, Stage 1, and Stage 2 clutch applications.
Not Yet Reviewed
$225.00
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$799.99
ATI Racing Transmission Slip Yokes
Bulletproof--ATI racing transmission slip yokes should be on your list of components to handle power-adders. ATI offers billet and forged options for Powerglide (including SuperGlide), T350, and T400 transmissions. They are made to accommodate Spicer 1350 Series U-joints. ATI racing transmission slip yokes are also offered for use with the PG roller bearing tailhousings and the forged yokes are available with quick-release caps.
( 6 )
$149.99
ACT Streetlite Xact Flywheels
ACT Streetlite Xact flywheels are designed to provide significantly improved engine response and acceleration at an affordable price. Order the model designed for your vehicle application. Features: * Lighter and stronger than OE flywheels * Better drivability and durability * Recommended for street use and drag racing * Designed using the latest CAD and Finite Element Analysis software * CNC-machined and dynamically computer-balanced for smooth operation at extremely high rpm * Entire forgings are heat-treated for strength and toughness * Tight tolerances for fit, concentricity, and parallelism * Adequate material behind the friction surface for excellent heat capacity * One-piece construction for reduced failure and uniform, efficient heat transfer—no more warped inserts * Integral ring gears are induction-hardened for longer gear life and weight reduction where it matters most—eliminates gear breakage or separation * Ring gears are cut with lead-in chamfers for better starter engagement and to prevent rounding-off gear teeth * SFI-certified
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$255.00
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$968.00
Moser Engineering Replacement C-Clip Axles
Moser Engineering replacement C-clip axles are non-tapered with hardened bearing seats and machined C-clip grooves to fit OEM applications. These forged steel street axles are available in nearly two dozen lengths—and if you choose to narrow your rear-end at a later time, Moser axles can be shortened and re-splined. Order the model designed for your vehicle and axle application.
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$170.00
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$510.00
Allstar Performance Slip Yokes
Allstar Performance slip yokes are designed to provide a superior fit, exceptional balance, and optimum sealing and yoke movement. Yokes are an important component of any driveshaft assembly--and are used with many popular transmissions, including TH350, TH700R4, Muncie and Saginaw 3- and 4-speeds, Bert and Brinn non-ball spline. Machined from steel or forged steel, the yokes are available in standard lengths for most street applications with minimal suspension travel, as well as extra-long yokes for racing suspensions with a radical amount of travel. Order the Allstar slip yoke that best suits your application.
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$77.99
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$127.99
Reid Racing Yokes
These Reid Racing yokes are manufactured from quality material. They're designed to be used with your Reid Racing tailshafts.
( 1 )
$319.99
Auto Pro USA Transmission Slip Yokes
Auto Pro USA transmission slip yokes are careful reproductions of original equipment yokes. To ensure the correct fitment, they are designed to be direct-fit replacement parts for certain makes and models with specific transmissions. Carefully check your make, model, year, and transmission combination to be sure you order the correct slip yoke to fit your application.
Not Yet Reviewed
$83.99
