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.

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FTI Performance TH400 Level 4 Transmissions

FTI Performance TH400 Level 4 transmissions feature a full manual valve body equipped with a transbrake for the ultimate drag racer. They make an excellent choice for weekend bracket racers, high-powered street cars, and mud trucks. The transmissions have: a 34-element intermediate sprag, performance clutches and steels, high-flow pump, race-prepped stock case, deep aluminum pan, billet forward clutch hub, heavy-duty intermediate retainer, and a 4-clutch intermediate pack. Some models are compatible with Ultra Bell bellhousings.

4.57 out of 5 stars ( 14 )

$2,499.00

VEGE Remanufactured Automatic Transmissions

VEGE Remanufactured automatic transmissions enable you to get back on the road quickly—without breaking the bank! With its advanced and efficient production process, backed by more than eight decades of experience, VEGE is able to supply remanufactured automatic transmissions with a level of quality that equals that of new OEM products at extremely competitive prices. The parts are carefully inspected, cleaned, and then fully machined and assembled with top-of-the-line components. Thousands of models are available, with aluminum case, torque converter included, and gear options from one through eight. Includes fluid. Get your vehicle shifting into gear with a reman auto-trans from VEGE.

4.55 out of 5 stars ( 11 )

$2,404.99

TransGo Oversized S4 Regulator Valves

TransGo's new oversized S4 regulator valves GM 8L45 and 8L90 solve significant wear issues at the S4 regulator valve position. When General Motors made a change to the S4 regulator valve in both the 8L45 and 8L90 transmissions, the updated 2-land design and computer command strategy resulted in significant increased wear, even at low mileage. TransGo Performance redesigned this 2-land style S4 valve with an oversize hardened steel valve, lengthening the land on the spring side to restore hydraulic integrity of the circuit and sealing the signal oil side with a PTFE ring to ensure longevity. * Corrects/Prevents/Reduces: -- Slip 1-2 or 1-3 shift -- Harsh 1-2 or 1-3 shift -- Coast downshift clunks

Not Yet Reviewed

$25.71

Reid Racing 4L80E Tailhousings

Reid Racing 4L80E tailhousings are stronger and more rigid than a stock GM tailhousing due to the use of aircraft grade aluminum alloy, thicker walls, and additional gusseting. Precision machining and perfectly aligned bores minimize power loss while maximizing reliability, and Reid's reworked oil passage improves lubrication for the yoke and rear bearing. Reid Racing 4L80E tailhousings fit all stock 4L80E transmission cases, as well as Reid Racing's Super 80 transmission case. They are available with billet bronze bushing or roller bearing.

Not Yet Reviewed

$359.00

South Bend Clutch Stage 4 X-Series Clutch Kits

South Bend Clutch Stage 4 X-Series clutch kits are build-to-order clutch packages for vehicles modified to exceed Stage 3 hp parameters. The kits include a steel, single mass, SFI-approved flywheel for safety. The race-engineered pressure plate is modified for maximum plate load, and helps to deliver more transmittable torque, stability, extended life, and superior thermal resistance. The South Bend Clutch Stage 4 X-Series clutch kits provide noticeably better dynamics through higher clamp loads, when driving your vehicle to its limits. Order the Stage 4 X-Series clutch kit recommended for your specific vehicle and engine size. Features, items, and specs include: * Puck-style disc offered in sprung and un-sprung options * Graphite-impregnated ceramic or sintered iron friction material options * Torque ratings calculated at time of ordering * Engagement characteristics can be abrupt * Meticulous processing and advanced packaging materials

Not Yet Reviewed

$683.62

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$1,856.86

Summit Bucks

Action Clutch Stage 4 Clutch Kits

Action Clutch single disc clutch kits contain a range of street to high performance clutch systems built using American materials which are all locally sourced, just as it has been done for 60 years. Each stage kit has its own advantages as well as its own formulated friction materials. As you move up in stage, the clamping force of the pressure plate increases to provide more torque capacity, while maintaining a comfortable pedal feel. Action Clutch Stage 4 clutch kits are designed for heavy-duty drag, road, and drift racing. These kits have an on-and-off engagement, are recommended strictly for race purposes, and are engineered for low/mild horsepower vehicles. These Stage 4 MIBA unsprung ceramic kits create quick engagement, as well as some clutch chatter, which should be minimal once proper break-in is completed. Available in a 4- and 6-puck configuration, the 4-puck is more aggressive. After each kit is assembled, it goes through multiple quality checks, ensuring the best quality for you. Select the kit designed for your vehicle. Pressure plate and clutch disc features: * MIBA Friction ceramic material pads * Reinforced heavy-duty drive straps for increased durability * 4-stage, heat-treated diaphragm spring * 100 percent dynamically spin balanced * American grade rivets * Rigid hub type In the box: * Stage 4 clutch disc * Single diaphragm HD pressure plate * Release bearing * Pilot bearing/bushing (when applicable) * Clutch alignment tool * Information sheet * Action Clutch swag

Not Yet Reviewed

$705.46

Competition Clutch Stage 4 Clutch Kits

Competition Clutch offers Stage 4 clutch kits for a wide range of vehicles, including many Mazda, Subaru, Toyota, Scion, Geo, Lexus, Pontiac, Mitsubishi, Dodge, Plymouth, Hyundai, Nissan, Infiniti, Ford, Honda©, and Acura© models from 1975 and up. The kits provide up to 250 percent increase in torque capacity. They contain a 6-puck high-torque disc with ceramic buttons that are good for penetrating engagement with higher horsepower applications. Stage 4 clutch kits include a Competition Clutch performance pressure plate, 6-puck torque disc with ceramic buttons, throw-out bearing (where applicable), pilot bearing/bushing (where applicable), and alignment tool.

Not Yet Reviewed

$495.00

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$1,399.99

GSP Complete Hub Assemblies

GSP complete hub assemblies are engineered to provide OE fit, form, and function. They use premium materials, coupled with precise machining and balancing, to ensure smooth, vibration-free performance in all driving conditions. Additional features and benefits of GSP complete hub assemblies: * All-new components, engineered to standards equal to or better than OE, are used to manufacture GSP hub bearings and hub repair kits * Tempered hub components are tougher and less brittle to ensure long-term durability and resistance to impact damage * Hubs with sensors feature OE-specific harnesses and connectors for simple plug-and-play compatibility * Each hub is dyno-checked for proper sensor output before leaving the factory

5.0 out of 5 stars ( 6 )

$71.99

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$82.99

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