Availability
Eaton Detroit Truetrac differentials use a patented design of parallel-axis planetary helix gears to provide a quiet, automatic splitting of torque. They perform like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. These replacement units are available for dozens of axle applications.
( 499 )
$623.99
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$831.99
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
( 84 )
$825.00
Big torque doesn't have to mean big traction problems. Eaton Posi Performance differentials combine carbon friction discs with precision-forged gears to give you great traction, even under higher torque loads. Plus, the carbon friction discs produce smooth, quiet performance for the life of your vehicle.
( 104 )
$724.99
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$777.99
South Bend Clutch Dyna Max organic clutch kits are manufactured with performance organic friction material. Designed to provide smooth clutch engagement, these Dyna Max organic clutch kits include the necessary parts you need to do the job—and many kits include Kevlar® pilot bushings. The kits are available for a variety of clutch styles and applications and may come with or without a flywheel. Select the kit to fit your application needs.
( 99 )
$566.12
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$870.41
A higher-than-stock stall speed as delivered by these B&M Holeshot converters will provide several advantages and benefits to vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low-end power and torque. These high-stall converters allow the engine to launch the car at higher rpm, where more torque is available. They're a very good choice for the typical street machine that is looking for better launch capability and more strength.
( 83 )
$625.95
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$799.95
RT Off-Road slip yoke eliminator kits will keep your vehicles moving in the right direction. These kits include the necessary parts to convert the 231 transfer case to a rear fixed-style yoke, which not only provides great strength, but extends driveshaft length approximately 4 in., while reducing the angle. RT Off-Road provides a CV-style yoke, knowing that this style of driveshaft eliminates driveline vibrations and extends life. A properly lifted Jeep with the right aftermarket parts can explore all types of terrain. Keep from screaming for your life with RT Off-Road slip yoke eliminators.
( 4 )
$551.99
On Sale
QuickTime bellhousings for Circle Track, strip, and street applications are built from high-grade steel. The cone is spun, not rolled or stamped, allowing these bellhousings to be the most dimensionally stable and accurate for today's high performance vehicles offering proven performance. Choose the size and specs needed for fitment on your particular vehicle, then bridge your transmission and engine with a QuickTime bellhousing.
( 106 )
$949.95
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$1,449.95
$712.95
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$812.95
Yukon Gear & Axle Dura Grip positraction carriers offer great traction and strength, and yet are not overly aggressive for the streets. These nodular iron or steel replacements are 4-spring, Raybestos composite, clutch-style, limited-slip carriers—with internal gears machined from forged 4320 steel with stronger teeth. Assembled in the USA, the Yukon differential carriers are rebuildable, allowing for repairs or modifications without buying a new unit. They're available for fitment with nearly two dozen axle models. What are you using to transfer power? Choose smooth operation with strong lockup abilities to transfer torque—benchmarks of the Yukon Gear & Axle Dura Grip positraction carriers.
( 137 )
$538.00
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$834.99
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 * 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: * 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
( 99 )
$548.10
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$690.04
Summit Bucks
Have to replace the differential carrier on your vehicle? ACDelco differential carriers are genuine OEM replacements with the fit of original equipment. Made with top-notch OEM-quality, these units are built to not only last, but keep your vehicle operating safely.
( 2 )
$580.99
Summit Racing™ Positraction differential carriers deliver aggressive, yet smooth, controllable traction. Our carriers feature nodular iron cases, forged steel internals, strong teeth—and they're fully rebuildable. We offer fitments for dozens of axle models. Whether replacing or upgrading, Summit Racing™ Positraction differential carriers will put power to the pavement, providing the confidence and performance you need.
( 49 )
$568.99
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$730.99
Clutches are subjected to continuous wear and tear. LuK clutch kits are made with premium quality components, engineered and manufactured to be problem-free. These kits are functionally tested to meet OEM performance specifications and provide an innovative and quality engineered clutch kit. As an original equipment supplier, LuK develops the performance specifications for individual vehicle applications.
( 381 )
$509.99
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$809.99
Hays Twister 3/4 Race performance torque converters are designed to be the perfect solution for your street/strip machine. Hays designed the Twister torque converters to be one step short of being a "Full Race" converter giving you the perfect combination of performance and affordability. Every torque converter is hand built, inspected and tested to ensure they meet the top of the line quality you expect. To ensure consistency and improve performance each converter is built for one transmission with one bolt pattern, meaning a lighter converter to maximize performance. High flow stators promote better cooling and heavy duty Torrington bearings are used to increase strength and durability. Not ready to go a "Full Race" converter, Hays is there for you with their Twister 3/4 Race torque converters.
( 11 )
$749.95
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$799.95
Want to get back the power and gas mileage that you lost from installing those big tires on your Jeep? Motive Gear makes it easy to re-gear your 4x4 with their ring and pinion gear and installation kit combos. These complete kit combos include front and rear ring and pinion sets, plus front and rear bearing kits, giving you everything you need to re-gear the front and rear differentials in one package. The kits come in a wide range of ratios for most Dana applications. Their quality is the result of years of development, outstanding design, and state-of-the-art manufacturing methods to ensure a perfect fit for an easy install.
( 8 )
$610.21
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$912.87
Designed for spirited and daily driving, the South Bend Clutch Stage 1 clutch kits make for a great OEM replacement when your factory clutch gives out. The pressure plate included in this clutch kit has an increased clamp load that promotes longer life, and the disc is dual dampened for smooth engagement and increased transmission life. The disc has also been designed with premium friction materials, which will ensure for rapid heat dissipation and will help to increase the life of the clutch. Select the Stage 1 HD clutch kit designed for OE replacement or your performance application.
( 17 )
$501.32
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$892.64
Summit Racing™ heavy-duty truck automatic transmission rebuild kits feature the necessary parts to rebuild your transmission while improving it to stand up to the higher torque diesel engines in front of them. These rebuild kits are an excellent choice for increased durability, performance, and increased holding capacity when carrying or towing heavier loads. Available for a variety of transmissions, the Summit Racing™ heavy-duty truck automatic transmission rebuild kits are each designed, tested, and provided with parts that are engineered and selected to work best in each actual application without adding extra cost where it is not needed. Kits include: * Clutches: G3 Powerpack, high-energy gray or red clutches * Performance, regular or Kolene steels * High performance band (where applicable) * Molded pistons (where applicable) * High performance transmission filter * Bushing kit * Washer kit * Overhaul gasket kit includes gaskets, seals, and lip seals
( 1 )
$738.99
Summit Bucks
Sonnax heavy-duty remanufactured valve bodies are built to overcome chronic shift and converter clutch apply complaints. It provides firmer shifts and a moderately increased pressure curve to improve performance, especially in truck and towing applications. Numerous Sonnax valve upgrades are included to restore hydraulic clearances that lead to shift complaints, clutch distress, converter complaints and codes, solenoid issues and pressure problems. Line pressure rise has been moderately increased to overcome shift complaints, delayed engagements, and to increase holding power to the clutches. To guarantee the highest level of operational performance, this remanufactured valve body is tested on state-of-the art equipment to verify that solenoid feed, clutch, converter, and line pressures match or exceed OE specifications. Choose your preferred kit packaged for your transmission. The valve body includes the following: * Oversized TCC regulator valve and sleeve, and limit valve spring for firmer TCC application * O-ringed bore plugs and abuse plugs * New accumulator control valve and sleeve with spring * Oversized AFL line up * New forward accumulator piston and seal * New pressure switch manifold * New EPC solenoid * New TCC PWM solenoid Kit contents: * Remanufactured valve body * Separator plate * Upper case gasket plate * Lower valve body gasket plate * 1-2, 3-4 accumulator springs * EPC solenoid harness adapter for 2003 to later units * Sonnax line pressure booster kit
( 3 )
$563.04
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$582.46
Richmond Gear Pro Gear ring and pinion sets take it a step further. The gear sets are designed for race use only where hard launches and severe heat cycling occurs. They're made from a softer, more malleable 9310 steel alloy to be more resistant to breakage under harsh racing conditions. These gears feature an outstanding rotating weight loss of up to 6 pounds, ground pinion threads for trouble-free installation, and a special heat treatment for improved strength.
( 44 )
$522.17
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$748.99
Whether starting a new project or replacing an old part, you'll find what's needed with Spicer Drivetrain Products differential carrier cases. Spicer supplies carriers to many OE manufacturers, so the replacement units are every bit as tough as the originals. They'll accept all factory and most aftermarket internal parts, allowing for modifications. Going mild or wild … Spicer Drivetrain differential carrier cases are the place to start. Order the model recommended for your vehicle and axle application.
( 20 )
$584.99
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$774.99
McLeod hydraulic throwout bearing conversions are designed to convert your vehicle over to hydraulic power. They produce a softer pedal effort, giving you more manageable and smoother clutch operation. Also included are stainless steel braided hoses, steel fittings, an aluminum slave cylinder and a remote reservoir. The McLeod hydraulic throwout bearing conversions use your stock pedal and are easy to install and adjust.
( 14 )
$635.00
TCI trans-brake kits allow you to achieve maximum torque converter stall for quicker and more consistent reaction and 60 ft. times. They work like this: When the trans-brake is engaged, the vehicle can roll neither forward nor backward, and as you press on the accelerator, the engine can rev as high as the torque converter stall. Once the brake is released, power is immediately transferred to the rear tires, with less parts breakage than with a manual transmission.
( 21 )
$854.95
Using the latest technology, J.W. Performance has come up with these Ultra-Bell bellhousings. Built rugged and certified, these flexplate shields allow for special motor and transmission combinations to be easily mated together. Manufactured from one-piece cast aluminum, these Ultra-Bells are five times stronger than stock bellhousings, which makes them capable of withstanding even the most severe tire shake and can fit under most stock floorboards. Order the Ultra-Bell bellhousing designed to fit your application.
( 79 )
$500.24
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$760.06
ACT heavy-duty clutch kits offer a clamp load increase of 20 to 50 percent over OEM, significantly increasing torque capacity. The pedal feel with these clutches varies from stock to a moderate increase. Available for street and race applications, many are SFI-certified to ensure safety.
( 87 )
$507.00
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$873.00
Clearance
Yukon Gear & Axle ring and pinion sets are strong but quiet performers. Designed to handle some of the harshest conditions, these sets utilize the latest design and manufacturing technologies to afford you a smooth running gear that's durable and easy to set up. Yukon ring and pinions are available in hundreds of size, ratio, and axle model options. Whether you're on the street, off-road, or at the track, you'll experience unrivaled power and gear performance. Order the model recommended for your application.
( 172 )
$504.89
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$833.99
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