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.

Showing In Stock Items. Show All 854 Items.

Individual Parts

Part Groups

Results 1 - 24 of 651

Summit Racing™ Pro LS Torque Converters

Summit Racing™ Pro LS torque converters are designed for stock and modified LS-powered street vehicles that make up to 600 rwhp. They will furnish the extra stall speed that you need for quicker launches—and they pair well with our Summit™ Pro LS series camshafts. These computer-balanced torque converters feature: woven carbon lockup clutch lining; heavy-duty Torrington bearings; hand TIG welding; a new pilot, impeller hub, and turbine hub; and a custom stator. The torque converters are available in a variety of options; order the model recommended for your application.

4.23 out of 5 stars ( 35 )

$509.99

—

$809.99

Boss Hog LS Night Stalker Torque Converters

Boss Hog LS Night Stalker Series torque converters can take you from towing to rock crawling. They're offered in four levels to perfect your performance needs and designed to handle as much as 500 hp. The Boss Hogs use Torrington-style incased bearings throughout, and ACC Performance four-corner tack welds the turbine and impeller fins to maintain strength and quality. From stock to mildly modified LS-based engine equipped vehicles, the Stalker Series torque converters offer performance that is tough and reliable. With multiple models available, order the converter recommended for your transmission application.

3.77 out of 5 stars ( 30 )

$390.05

—

$616.99

Summit Racing™ LS Flexplate Spacers

Summit Racing™ LS flexplate spacers are designed to achieve proper spacing when you're installing an older GM automatic transmission to a LS engine. These spacer and bolt kits are manufactured from high-quality steel and correct the crank to transmission spacing differences between LS and early Chevrolet small block engines.

4.75 out of 5 stars ( 28 )

$61.99

Advance Adapters LS Series Flexplate Adapter Kits

Advance Adapters LS Series flexplate kits allow you to fit the TH400/TH350/700R transmission to the Gen III/LS engine. The kits include a custom flexplate to fit your specific transmission, a crank spacer that compensates for the shorter engine crank, and 11mm flexplate bolts.

4.63 out of 5 stars ( 48 )

$176.71

Summit Racing™ Pro LS Transmission Adapters

Summit Racing's Pro LS transmission adapters enable you to swap to more common and inexpensive manual transmissions from other vehicles. In addition to the bellhousing adapter, they often include handy items like the billet steel flywheel, fasteners, pilot adapter, and starter mounts. These adapters allow the use of the high performance clutches commonly used with the transmission. The kits are available for 5-speed or 6-speed applications.

5.0 out of 5 stars ( 1 )

$287.99

—

$1,266.99

Boss Hog LS Street Bandit Torque Converters

Torque converters are considered one of the most mysterious mechanical components in today's vehicles. They function like a clutch and keep the engine running even when the vehicle comes to a halt. By designing the stall speed to match both the engine and desired stall speed, ACC Performance converters help low-end idle speeds, improve performance, and acceleration. ACC Performance Products has emerged as an out-right leader in torque converters and here's why: * Boss Hogs are welded, not furnace-brazed; furnace brazing is not the best way to adhere torque converter components, it will erode and ruin the stators and all rotating parts * Industrial Torrington bearings handle more torque than smaller, uncased needle bearings * Aircraft aluminum washers instead of fiber washers put more horsepower and torque directly to the ground * ACC converters are hand-built and tested to ensure that you get the best converter money can buy * With returns below one percent, you are assured of the highest quality parts available * LS Street Bandit converters are designed to handle as much as 650 hp * Custom-engineered turbine hubs maintain the highest quality, strength, and durability * Stators are built with high-flow vents and channels for greater cooling to handle greater power and higher temperatures * Engineered with a single bolt pattern that makes ACC converters surprisingly light to free up your motor and allow it to gain rpm quicker Notes: * LS Boss Hog Street Bandit torque converters are not designed to handle the extreme shock and abuse of nitrous oxide or trans-brakes * It is imperative that a transmission cooler be added with any torque converter that is rated over stock stall speed

3.5 out of 5 stars ( 10 )

$576.98

—

$690.04

Bowler Performance GM LS T-56 Magnum 6-Speed Transmission Packages

Bowler Performance GM LS T-56 Magnum 6-speed transmission packages are designed, tested, and built for the aftermarket. The Magnum offers a "no compromise solution" for your hot rod project, and is rated to handle tire blistering torque. Weighing in at 135 lbs., the T-56 features a single rail shifter design, 3-piece synchronizer assemblies, and three shift lever locations. Choose the Magnum model with the gear ratios you prefer. Packages feature: * T-56 Magnum 6-speed transmission * LS aluminum bellhousing * OE LS throwout bearing/hydraulic slave with -4AN inlet and remote bleeder * Flywheel, clutch, bolts * Billet 31-Spline 1350 Series slip yoke * Dial indicator plate for concentric bellhousing alignment * All-in-One harness with reverse lock-out control module * Energy Suspension mount * 4 qts. of Royal Purple Synchromax fluid * 12-month warranty

Not Yet Reviewed

$6,742.99

Summit Racing™ LS Crankshaft Pilot Extensions

Summit Racing™ LS Crankshaft Pilot Extensions are an adapter bushing that extends the end of the crankshaft pilot allowing you to use an older-style GM automatic transmission on your LS1 engine. Summit Racing™ LS crankshaft pilot extensions have steel construction and tapered fit to provide long wear and an uncomplicated installation.

4.5 out of 5 stars ( 6 )

$29.99

ICT Billet LS Flexplate Bolt Sets

ICT Billet LS flexplate bolt sets are high-strength for your high performance applications. The bolts are offered in standard and extended-lengths.

3.88 out of 5 stars ( 8 )

$25.99

—

$36.99

Boss Hog LS Wild Boar Outlaw Torque Converters

ACC Performance LS Wild Boar Outlaw converters are built with the same quality parts as the Boss Hogs, but have the added features of welded fins (or furnace-brazed upon request) and anti-ballooning plates. These converters were designed for applications with added horsepower, such as nitrous and trans-brake. The Outlaw converters are 9.60 in. in diameter and have stall speeds ranging from 2,800 to 4,2000 rpm.

3.67 out of 5 stars ( 3 )

$819.76

—

$1,212.59

Boss Hog LS Crankshaft Pilot Extensions

Boss Hog offers LS crankshaft pilot extensions for a variety of vehicles from the 1990s and up. The steel adapter sleeves are designed for use with short flange cranks and an OEM or aftermarket flexplate. They properly locate the torque converter pilot into the rear of the crankshaft. Order the adapter recommended for your year/make, engine, and transmission application. Note: Ensure that the torque converter and flexplate have the same bolt pattern.

Not Yet Reviewed

$17.96

Advance Adapters LS Series Gen III Manual Transmission Conversion Kits

Hook up to your GM manual transmission with Advance Adapters Gen III/LS Series flywheel and clutch kits. These conversion kits contain custom clutch components designed to adapt the Gen III/LS Series to your GM manual transmission. The flywheel is specially designed for the included high performance LUK clutch components. Do you have a special conversion? Advance Adapters LS series Gen III manual transmission conversion kits make change easier. Features include * Custom flywheel * 11mm flywheel bolts * 11 in. pressure plate and disc * Pilot bushing spacer * Throwout bearing * 10mm bellhousing bolts * 10mm lockwashers * XRP dowel bolts

3.5 out of 5 stars ( 6 )

$888.00

Trick Flow® LS Flexplate Spacers

For those wanting to bolt a GM LS engine to an older GM automatic transmission, Trick Flow® has you covered with these LS flexplate spacer and bolt kits!

5.0 out of 5 stars ( 1 )

$84.99

Powertrax Grip LS Traction Systems

Powertrax Grip LS traction systems are the latest design in differential tech upgrades. They combine the smooth operation of a limited-slip differential, with the strength of a fully machined case. These systems use carbon fiber and steel friction plate technology, delivering streetable and consistent traction. They arrive completely assembled--and because there are friction plates on machined internal gears, they are fully rebuildable. The carriers are the ideal solution for just about any light truck, sport utility, and muscle car on the road today.

4.2 out of 5 stars ( 5 )

$505.92

—

$924.99

Engine Works LS Flexplate Spacers

Engine Works LS flexplate spacers are high-quality steel adapters designed to achieve optimum spacing when installing a non-LS transmission to an LS-based engine. Attain proper clearance with Engine Works LS flexplate spacers.

Not Yet Reviewed

$56.21

Bowler Performance GM LS TKX 5-Speed Transmission Packages

Bowler Performance GM LS TKX 5-speed transmission packages are designed, tested, and built for the aftermarket. The TKX offers 600 lb.-ft. of torque capacity and is capable of engine speeds of 8,000 rpms with shifts at 7,500 rpms. It is designed for multiple applications with three shifter locations, and a compact, end-loaded design that provides clearance in most transmission tunnels without floor modifications. Choose the TKX model with the gear ratios you prefer. Packages include: * GM TKX 5-speed transmission * Cast aluminum bellhousing and required hardware * Tilton 6000 Series throwout bearing with -4AN inlet and remote bleeder * RAM single disc clutch kit with spring hub discs, billet steel flywheel, and all required hardware good for up to 550 hp * Reverse light and electronic speedometer pigtail connectors * Energy Suspension transmission mount * 3 qts. of Royal Purple Synchromax fluid * Roller pilot bearing * 12-month warranty

Not Yet Reviewed

$5,689.99

Canton Racing LS Engine Bellhousing Flywheel Covers

If you have installed or will be installing an aftermarket performance oil pan on your Chevy LS engine, you'll want one of these Canton Racing LS engine bellhousing flywheel covers. They are designed to fit the popular T-56 transmission GM F-body bellhousing. The covers protect your flywheel and clutch from dirt and debris by covering the opening created behind the oil pan when the stock oil pan is swapped for an aftermarket one. The Canton Racing LS engine bellhousing flywheel covers are manufactured from aluminum and include mounting hardware for installation.

4.67 out of 5 stars ( 3 )

$48.00

Mantic Clutch USA 9000 Series Twin Disc Clutch Kits

Stock clutches are made for stock horsepower. Mantic Clutch USA 9000 Series twin disc clutch kits are direct replacement upgrades that can handle 1,010 lb.-ft. of torque capacity at the crank and roughly up to 820 to 850 lb.-ft. at the wheels (capacity will vary with use and type of power adder being utilized). Engineered for serious performance builds, Mantic 9000 clutch kits are the proven answer to transfer all power to the ground and driving your vehicle with a Mantic Twin is easy, pedal effort remains relatively low, with approximately 12 to 15 percent increase over the OE clutch pedal feel. Available for many applications, Mantic Clutch 9000 Series twin disc clutch kits with their ceremetallic friction material and all billet construction make them the best for severe duty yet street friendly. Features and benefits: * SFI approved 1.1 * All billet construction * No Flex at high rpms * High-torque capacity * Lightened flywheel revs quicker compared to heavier OE flywheels * Completely rebuildable—modular construction makes service easy * 9 in. twin disc clutches reduce Moment of Inertia (MOI) for quicker more precise shifts * Ceremetalic friction material offers more heat resistance * OE hydraulic release bearing * All necessary hardware * Cover and components machined from billet stock adding strength and durability

5.0 out of 5 stars ( 2 )

$2,014.00

—

$2,797.00

J.W. Performance The Wheel Flexplates

The Wheel precision-machined flexplates from J.W. Performance feature double-welded, high-quality ring gear and the highest quality steel centers. They are designed to take the punishment of today's high-horsepower revving motors from street to ProMod applications. All of J.W.'s flexplates are SFI-certified and have a replaceable ring gear. They're available in a heavyweight style for quicker launches and more rpm during the shift, or in a lightweight style for faster turbo spool time and improved engine response in street, Circle Track, and road race applications.

4.18 out of 5 stars ( 33 )

$424.97

Summit Racing™ Automatic Transmissions

Summit Racing™ Automatic Transmissions combine quality and economy to offer replacement transmissions in many styles and options. These units are remanufactured with all-new clutches, thrust washers, seals, bushings, and high-energy bands, along with other "failure prone" hard parts depending on unit. Other features include a rebuilt front pump, a valve body with shift for street and performance and high-quality seals and gaskets. You get all these impressive upgrades, along with reliable performance and extreme value. All transmissions are Dyno tested before they're shipped. Order the model recommended for your vehicle.

3.46 out of 5 stars ( 63 )

$1,849.99

—

$6,190.99

McLeod RST Street Twin Clutch Kits

Intended for high-horsepower street fans, the McLeod RST Street Twin clutch kits are economically priced twin disc clutches that use your existing flywheel. Able to handle up to 800 hp, the RST Street Twin clutches remain completely street-drivable. The organic lined clutch discs provide smooth engagement with a soft pedal effort, making these clutch kits ideal for the street performance enthusiast. (For select vehicles where these clutches are not adaptable to your existing flywheel, a new flywheel is included in the kit.) Here are some additional features of the McLeod RST Street Twin clutch kits: * Alignment tool included * Lighter-than-stock pedal feel * Will bolt to factory flywheel * CNC-machined and anodized flywheel adapter ring * Organic disc facing for smooth and even clutch engagement with excellent release qualities * Low rotating mass for quick revs * Blanchard ground floater with multiple straps to reduce noise for streetability

4.49 out of 5 stars ( 84 )

$825.00

—

$1,495.00

FTI Performance SB Series Torque Converters

FTI Performance SB Series torque converters are an excellent choice for mildly modified engines. They work well in street rods with air conditioning, as well as weekend bracket racers. The converters feature Torrington bearings, hardened impeller hub, hub furnaced and TIG-welded fins, high performance clutch lining, and strengthened sprague.

4.21 out of 5 stars ( 84 )

$651.98

Summit Racing™ Torque Converters

Designed for stock and mildly hopped-up street vehicles, our Summit Racing™ torque converters give you the extra stall speed that you need for quicker launches. They're available for a variety of transmission makes and models. Summit Racing™ converters are computer-balanced and feature: * Submerged arc welds * New turbine hub * Custom stator * New pilot * New impeller hub

3.97 out of 5 stars ( 366 )

$439.99

—

$509.99

McLeod RXT Street Twin Clutch Kits

McLeod RXT Street Twin clutch kits are ideal for the extreme horsepower enthusiast who wants performance and economy. Capable of handling up to 1,000 hp, the RXT Street Twin clutches are for those who've kicked it up another notch—but still require streetability. The ceramic facing on the clutch discs provides slightly aggressive engagement with a soft pedal effort, making these clutches suitable for most street performance enthusiasts. Match your vehicle specs to the correct model from McLeod. Additional features include: * Alignment tool * Lighter-than-stock pedal feel * Available with dedicated flywheel or adapter ring for factory flywheel * CNC-machined and anodized flywheel adapter ring * Smooth engagement with excellent release qualities * Ceramic facings on disc increase holding power over similar organic linings * Low rotating mass for quick revs * Blanchard ground floater with multiple straps to reduce noise for streetability

4.68 out of 5 stars ( 47 )

$995.00

—

$1,795.00

Page 1 of 28
Next