Transmission & Drivetrain
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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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American Powertrain ProFit Tremec TKX manual transmissions and installation kits put the power to the pavement with unmatched durability and versatility. Tremec has normally sourced their aftermarket transmissions from the OE side, such as the Magnum T-56 and the T-5, but this new design is made from the ground up as a strictly aftermarket transmission. Designed to fit classic muscle cars and customs, the TKX has a tighter, more streamlined case, and features 600 lbs.-ft. of torque capacity and are capable of engines speeds of 8,000 rpm with shifts at 7,500 rpm. The compact design provides clearance in most transmission tunnels without floor modifications, while case strength has increased from previous models with the new 3-piece aluminum housing and gaskets at all flanges simplifies installation and eliminates fluid leaks. Additional features include: * Designed with your specific vehicle application in mind * Available with multiple gear ratio configurations for compatibility for multiple applications with three shifter locations * Multi-cone synchronizers and synchronizer rings are made of sintered bronze and carbon for superior shifts * All gears are supported by caged needle bearings to reduce end play * Gears and shafts are made from ASTM 4615 grade steel and provide increased torque carrying capacity * TKX manual transmissions have 31-spline output shafts for added strength, built-in reverse light switches, and cruise control safety switches * The TKX also has separate GM and Ford case patterns and input configurations—with integrated GM and Ford transmission mount patterns * Installation kits include a driveshaft slip yoke made from cryogenically hardened steel, a polyurethane transmission mount, a steel roller pilot bearing, and a reverse light wiring harness
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$4,095.95
Ford Performance Parts axle bearings are the way to go for durability and performance. Manufactured to strict tolerances, these high-quality steel bearings are an ideal choice when rebuilding your axle. They are available for a variety of applications, including independent rear suspension hubs. Some kits include bearing seals.
( 27 )
$46.99
TransGo valve body repair kits give you the components needed to restore proper shifts and correct other problems with your automatic transmission. They will help correct cold rough shifts, downshift problems, long shifts, hard or soft shifts and lockup problems. Repair your automatic transmission with TransGo valve body repair kits.
( 8 )
$68.67
Clearance
Unplugged Performance limited slip differentials provide a direct drop-in replacement for the stock Tesla Model 3 and Model Y open differentials. These LSDs improve the efficient distribution of power between wheels without using the brakes and stability control software. They help put more power to the ground without slowing the vehicle unnecessarily in conditions where one or more wheels lose traction, such as high G-force cornering, off-roading, and driving in inclement conditions like snow and ice. Tested and validated on the Pikes Peak Race Car with testing by Randy Pobst, Unplugged Performance limited slip differentials redistribute torque automatically to the wheel with the most traction! More product features and notes: * Gear-based design ensures smooth and silent operation without maintenance * Maximizes traction and reduces stability control interventions * Designed for performance driving—essentially no benefit for a daily driver or commuter use
Not Yet Reviewed
$2,194.99
$1,646.50
Factory driveshafts are made from a smaller tube (there are 2 different types) and will flex and bend during hard acceleration, causing the rubber drives to wear out prematurely. The Driveshaft Shop torque tube driveshafts are made from 3 x .125 wall 6061 T-6 aluminum and uses The Driveshaft's own custom machined ends. This ensures that the shaft will not distort or break like the factory units, and offer units rated up to 1000 hp. Choose the driveshaft designed for your vehicle.
( 3 )
$1,524.48
On Sale
B&M NAG-1 locking transmission dipsticks are designed to allow for a quick and easy check of the automatic transmission fluid level and quality by the vehicle owner, without having to go to the dealership. They're constructed of billet steel and black mil-spec anodized aluminum 6061-T6. The dipsticks allow for both cold and warm fluid level checks and are meant to be left in the vehicle and locked into place. B&M NAG-1 locking transmission dipsticks feature an engraved B&M logo, a locking knurled handle cap, and a temperature range engraved indicator end.
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$123.95
$111.55
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$131.95
On Sale
McLeod Super StreetPro clutch kits are great Street/Strip performance clutches—perfect for use with moderate engine modifications, including intake and exhaust upgrades, camshaft and cylinder head work, and engine management programming. Super StreetPro kits provide a heavier pedal effort than stock, along with improved holding capacity, making these excellent high performance replacement clutches. Additional features and benefits include: * SFI-approved assembly * Handle up to 500 hp * Dual-faced organic and ceramic disc for smooth engagement with exceptional holding capacity
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$355.00
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$365.00
$319.50
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$328.50
On Sale
McLeod StreetPro clutch kits are excellent performance clutches for street enthusiasts. StreetPros are ideal for use with basic engine modifications, including cold-air intakes, exhaust upgrades, and engine management programming. These McLeod kits provide slightly heavier pedal effort with increased holding capacity, making them excellent factory replacement performance clutches. Order the size to match your vehicle specifications. Additional features and benefits include: * Bolt to stock flywheels * Handle up to 400 hp * Organic disc facing for smooth engagement with excellent release qualities
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$295.00
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$325.00
$265.50
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$292.50
On Sale
The industry standard for over 30 years, Hurst Competition/Plus shifters offer state-of-the-art control for popular 4-, 5-, and 6-speed manual transmissions. Dedicated applications ensure a custom fit on a wide variety of vehicles with factory consoles without any floor pan modifications. Other features include race track-proven design and reliability, adjustable gear stops to prevent over shifting and prolong transmission life, and an easy-to-follow installation guide.
( 120 )
$599.95
$538.95
On Sale
If you're into aggressive street driving and occasional track driving, McLeod Street Extreme clutch kits hold up to 700 lbs.-ft. of torque with street tires and moderate engine mods. These SFI-approved packages are the perfect upgrade for high-horsepower Mustangs (and other cars) that need reliable shifting on the street and the track. They feature a dual-faced ceramic friction disc, high clamp load pressure plate, pilot tool, throwout bearing, and pressure plate bolts (where applicable). You can run your pony with complete peace of mind. Street-friendly and track-proven, a McLeod Street Extreme clutch kit is your best decision. Order the model recommended for your application.
( 48 )
$425.00
$382.50
On Sale
McLeod Non-SFI aluminum bellhousings are the gold standard when it comes to accuracy and compact performance. These Non- SFI rated version is for those customers looking for a light weight bellhousing, but not concerned with a SFI rating so these units do not come with a steel block plate.
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$185.00
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$295.00
$166.50
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$265.50
RAM hydraulic release bearings offer maximum flexibility when setting up the clutch release system in your early or late model car or truck. RAM heavy-duty hydraulic bearings use larger, more robust O-rings, providing the ultimate in durability and long life when compared to factory and other aftermarket hydraulic systems. RAM hydraulic bearings are fully adjustable and are easy to set up with most aftermarket clutches, single or dual disc. RAM hydraulic bearings are also a great choice for use in your Tremec transmission conversion. Application specific bearing kits include every fitting, line, shim and adapter needed to connect directly to the factory master cylinder. RAM also offers other bearing styles with a wider 3.150 in. bearing face needed for 3 and 6 lever clutch applications. When only the best will do, choose RAM!
( 74 )
$199.00
On Sale
For the ultimate in performance, feel, and dependability, mount your Street Super shifter with the appropriate Hurst installation kit. The shifters mount high on the transmission allowing the shift arms to be almost completely straight for added strength and leverage when racing. Hurst Street Super shifter installation kits include the necessary mounting plate, shift arms, hardened steel shift linkage rods, rod adjusting buttons, nylon bushings, spring clips, necessary hardware, and instructions.
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$318.95
$287.05
On Sale
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
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$825.00
$742.50
On Sale
RAM Muscle Car clutch kits are the perfect choice for mildly modified street cars and trucks where driveability is most important. RAM Muscle Car kits are popular for older restoration vehicles as well as late model cars and trucks with basic bolt on engine modifications such as headers and air intakes. These RAM kits offer super smooth clutch engagement and increased holding power with only a slight increase in pedal effort. All kits include the pressure plate, clutch disc, alignment tool, and release bearing where applicable.
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$289.00
$260.10
On Sale
RAM Powergrip clutch kits offer your vehicle the perfect blend of drivability and performance. This dual-purpose clutch kit will provide more clamping pressure over a stock unit and can handle power levels up to 550 hp. All Powergrip kits feature an increased clamp load pressure plate, providing crisp clutch engagement with only a slight increase in pedal effort. The Powergrip clutch disc features a combination dual-sided disc with RAM's premium organic facing material on one side and RAM's premium 900 series metallic facing material on the other side. This allows the Powergrip unit to deliver optimum street/strip performance. The RAM Powergrip discs also utilize an 8-spring hub to maximize disc strength and durability. All kits include the pressure plate, clutch disc, alignment tool, and release bearing where applicable.
( 52 )
$469.00
$422.10
Spicer Drivetrain Products Life Series U-joints consistently outperform the rest, so you can hit the road or trail with confidence. Cold-forged from high-quality steel, these SPL universal joints feature synthetic thrust washers, multi-lip seals, and the choice of greaseable or non-greaseable. Get the most out of your rig with Spicer Life Series U-joints. Order the replacement model designed to fit your vehicle.
( 113 )
$27.99
On Sale
Hays Street 450 clutch conversion kits are an excellent upgrade offering up to 30 percent more holding power (clamping force) over your stock clutch. They're designed for handling stock to mildly modified engines—up to 450 horsepower. If drivability along with a stock pedal feel are the leading factors for your application, then order the Hays Street 450 clutch conversion kit recommended for your specific vehicle and engine size. Features, items, and specs: * Smooth, chatter-free operation using top quality organic composite friction surface material * Upgraded damper springs * Pressure plate * Clutch disc * Throwout bearing * Alignment tool * Instructions
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$499.95
$427.95
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$570.95
On Sale
McLeod Street Level clutch kits are the perfect choice for entry level replacements for the street. They include high clamp load pressure plates for increased holding power and organic discs for smooth and even engagement. Offered for a wide range of applications, these complete kits are recommended for vehicles with mild bolt-on upgrades. Replacing your stock setup with one of these efficient McLeod Street Level clutch kits will prove to be an excellent value. Order the model/options designed for your vehicle and engine.
( 38 )
$255.00
$229.50
On Sale
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
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$995.00
$895.50
Zoom 30000 Series clutches are designed for 60s and 70s American muscle cars. These sets include higher clamp load Zoom assemblies and organic clutch discs (except where noted) with high burst strength organic facings. They also come complete with release bearing, pilot bearing/bushing, and alignment tool. Features include: * 20 to 60 percent increase in torque capacity over a stock clutch * Complete 5 piece sets include everything needed to do the job right * Premium, high burst strength organic facings * Higher clamp load cover assemblies with Zoom anti-rust finish * Specifically for '60s and '70s American muscle cars with mechanical linkages
( 52 )
$166.99
On Sale
Hays Street 650 clutch conversion kits are designed to handle highly modified engines up to 650 hp naturally aspirated (600 hp for forced induction and nitrous combinations). The new 26-spline versions work in conjunction with a modern 5- or 6-speed transmission swap. These are true street/strip clutches for spirited high performance driving or frequent track use. The high performance dual-friction disc utilized in the Street 650 has an upgraded spring hub with heavy-duty damper springs to handle greater shock loads versus a standard damper spring. The disc features a sintered metallic friction surface and an organic friction surface. It does a great job at dissipating heat and fighting the slippage found in ordinary discs, along with providing the smooth engagement characteristics of a street-style clutch. These conversion kits also provide an upgraded heavy-duty pressure plate to round out the performance clutch. The Street 650 is a great choice if you visit the track often. Order the model recommended for your vehicle application. Features and benefits: * Upgraded damper springs deliver up to 30 percent more clamping pressure than stock OE clutch * Dual-friction disc offers the best of both worlds—smooth engagement and excellent holding capacity * All Street 650 clutch kits come complete with pressure plate, disc, throwout bearing, and alignment tool
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$699.95
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$1,049.95
On Sale
RAM premium replacement clutch kits are the first choice of professional installers, because each set contains the correct replacement parts to ensure proper fit and operation in your vehicle. Kits include an OEM diaphragm or lever style pressure plate, clutch disc, and a clutch-alignment tool. Some clutch sets will include a throwout bearing. The clutch disc features either a 5- or 6-spring standard hub or helix hub, just like the originals. These clutch sets are great for unmodified street vehicles and restorations. The flywheel must be resurfaced or replaced prior to installation to validate the warranty. RAM clutch kits are available in more than a hundred models for fitment on thousands of vehicle-specific applications.
( 91 )
$239.00
On Sale
RAM Powergrip HD clutch kits are the ultimate kit for extreme street and track performance. This race inspired clutch kit will provide more clamping pressure over a stock unit and can handle power levels up to 650 hp. All Powergrip HD kits feature an increased clamp load pressure plate, providing crisp clutch engagement with only a slight increase in pedal effort. The Powergrip HD clutch disc features RAM's premium 900 series metallic facing material on both sides. This allows the Powergrip HD unit to deliver maximum grip in an extreme high-horsepower street or racetrack application. These RAM Powergrip discs also utilize an 8-spring hub to maximize disc strength and durability. All kits include the pressure plate, clutch disc, alignment tool, and release bearing where applicable.
( 23 )
$549.00
$494.10
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