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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Results 1 - 24 of 307

Steeda Cable Adjuster Kits

Are you looking for an easy way to adjust your clutch? Steeda's exclusive double hook design adjusters, along with the supplied firewall adjuster and cable, give you many adjustment choices. These Steeda kits are fully adjustable and allow an enthusiast to set the clutch travel to any preference with ease. A must with heavy-duty clutches, they're easy to install and simple to adjust. They come complete with hardware and instructions.

4.71 out of 5 stars ( 45 )

$132.51

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$147.98

Summit Racing™ Adjustable Clutch Cable and Quadrant Kits

Summit Racing™ adjustable clutch cable and quadrant kits adjust your clutch pedal travel to respond better to your individual driving habits. The kits contain all parts necessary to convert your stock adjustable clutch to a more versatile adjustable style.

3.45 out of 5 stars ( 31 )

$69.99

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$132.57

Steeda Firewall Cable Adjusters

Are you looking for an easy way to adjust your clutch? Steeda's firewall mounted clutch adjusters let you adjust your clutch engagement without having to crawl under the car. Just turn the adjuster knob on the firewall and you're done! Steeda designed these adjusters with a bigger adjustment range and a locking tab to keep the adjuster base from rotating, allowing you to make adjustments with one hand.

5.0 out of 5 stars ( 3 )

$72.52

Summit Racing™ Firewall Clutch Cable Adjusters

These Summit Racing™ firewall clutch cable adjusters are just what you need to get that new adjustable cable perfect. They are designed to bolt to the firewall and allow easy adjustment for the clutch cable.

4.0 out of 5 stars ( 9 )

$36.99

BBK Adjustable Clutch Cable and Quadrant Kits

BBK adjustable clutch cable and quadrant kits are constructed from 356 aluminum. These kits are fully adjustable and allow an enthusiast to set the clutch travel to any preference with ease. A must with heavy-duty clutches, they're easy to install and simple to adjust. They come complete with hardware and instructions.

4.16 out of 5 stars ( 25 )

$139.99

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$169.99

RAM Hydraulic Throwout Bearing Travel Adjustment Systems

RAM hydraulic throwout bearing travel adjustment systems are designed for late model vehicles equipped with internal slave cylinder and bearings. Factory hydraulic systems do not allow for adjustment of the pedal position, often resulting in a high engagement point when using aftermarket clutches. The Ram system allows you to adjust your pedal position lower to the floor for better driver comfort, while allowing you to minimize the release of your clutch system for racing applications. Some vehicles experience shifting problems at higher RPM due to over centering, or over travel of the clutch fingers. By limiting this travel and setting the clutch pedal for minimum release this over travel situation can be eliminated, restoring clean shifts at high RPM.

4.75 out of 5 stars ( 12 )

$145.00

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$219.00

Ford Performance Parts Differential Bearing Adjuster Bolt Kits

Ford Performance Parts differential bearing adjuster bolt kits are designed to secure the differential bearing adjuster nuts on differential carriers. They include two bolts and two locks to complete the installation.

5.0 out of 5 stars ( 2 )

$6.99

Granatelli Motor Sports Adjustable Clutch Cable and Quadrant Kits

Granatelli Motor Sports adjustable clutch cable and quadrant kits are available for a variety of applications, including many 1970s and up Ford Mustang models. These parts are built with high-quality materials via factory specs to enhance your car's shifting performance. For replacement or upgrade, equip your ride with Granatelli clutch components.

Not Yet Reviewed

$85.88

Sonnax Externally Adjustable Low/Reverse Servo Kits

Sonnax externally adjustable low/reverse servo kits make band maintenance quick and easy. They offer an ideal way to improve reliability and make staging more consistent and predictable. Checking L/R band adjustment after repeated use is good practice. Unfortunately, OE servos with steel covers are difficult to adjust in a vehicle, so a quick check with such a servo installed is impractical for most racers. Sonnax externally adjustable servos provides an improved design that makes checks and adjustment of the L/R servo easy. There is no cover or access plug to remove because the adjuster itself extends through the cover. A quick check is done simply by pushing on the end of the adjuster and observing the movement of the piston relative to the servo cover. Select the kit designed for your transmission. Features: * Quickly check and adjust the low/reverse band to prevent trans-brake malfunction * Unique servo cover and adjuster design makes in-vehicle band service easy * Works with or without OE 1-2 accumulator piston Included: * 6061 Anodized billet aluminum cover * Piston * Pin * Jam nut * Cover seals -- Two PTFE, one extra * Piston seal * Cover O-ring * Pin O-ring Kit for TH400 will also include: * Cover flange O-ring * Bolts (6) * Washers (6)

Not Yet Reviewed

$353.26

HardDrive Axle Adjuster Spacers

Motorcycle rear axle adjuster spacers essentially act as a shim to fine-tune the wheel position within the swingarm. HardDrive axle adjuster spacers are chrome plated steel replacements for your Harley® that allow precise adjustment of the wheel alignment and chain tension by providing space to move the axle slightly forward or backward.

Not Yet Reviewed

$33.26

Granatelli Motor Sports Clutch Cable Firewall Adjusters

Granatelli Motor Sports clutch cable firewall adjusters will allow you to make quick and easy adjustments at home or at the track. These easy-to-turn aluminum firewall clutch adjusters eliminate the factory wimpy plastic unit and rubber bushing at the firewall, works with all clutches, and features a unique locking ring to prevent ''cable rewind'' and promises faster, more precise clutch engagement. The double hook quadrant is machined from 6061-T6 aluminum for strength and reliability and the innovative design offers both conventional and quick release cable locators. These adjusters are offered separately and will interchange with most other aftermarket systems—or buy a kit that also includes a high-quality cable and all necessary hardware—and save time and money! Key features: * Direct OEM replacement * Faster and more precise clutch engagement, 55 percent more adjustment range * Easy adjustments with one hand; thanks to anti-rotation tab and larger diameter * Eliminates the rubber bushing at the firewall * Works great with adjustable clutch quadrant (available as a set or separately) * Durable blue anodized finish * Includes all necessary hardware * Installs in approximately 1-hour using basic hand tools

Not Yet Reviewed

$55.51

Summit Racing™ Adjustable Vacuum Modulators

Every transmission rebuild should include a new vacuum modulator. Our Summit Racing™ Adjustable Vacuum Modulators allow you to tailor the shift points up or down a few hundred RPM and dial in your GM turbo Hydramatic transmission to shift right where you want it.

4.68 out of 5 stars ( 34 )

$21.99

McLeod Adjustable Ball Studs

McLeod offers these adjustable ball studs for a variety of applications. You can count on McLeod for quality parts for your clutch setup.

3.4 out of 5 stars ( 35 )

$46.00

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$48.00

McLeod Adjustable Clutch Master Cylinders

McLeod adjustable clutch master cylinders offer the best performance for your ride. These replacement or upgrade master cylinders enable you to move your clutch engagement point up or down in the pedal travel without the use of shims. They also feature a larger bore than stock, which improves upper rpm engagement. The factory-style units are constructed of aluminum with a black or natural finish. Order the model recommended for your vehicle.

4.33 out of 5 stars ( 3 )

$175.00

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$355.00

Summit Racing™ Adjustable Clutch Cables

Summit Racing™ adjustable clutch cables are replacement cables for your Summit Racing™ adjustable clutch cable and quadrant kits. They allow you to replace your stock Mustang non-adjustable cable with the more popular and versatile adjustable type.

4.43 out of 5 stars ( 7 )

$40.99

Sonnax Adjustable Rear Servo Pin Kits

The Sonnax adjustable rear servo pin kit 34912-01K replaces GM TH400 and '95-earlier 4L80-E servo pins. OE pins have seven different lengths to allow for adjustment of the Low/Reverse band—but are no longer available from GM. The Sonnax pin kit has an adjustment range that covers the five longest OE pins to allow for accurate setting of the Low/Reverse servo piston travel. The pin features an O-ring groove to prevent leakage of line pressure past the case pin bore. Kit contents: * Servo Pin * Screw * (4) Small washers * (1) Large washer * (2) O-Rings

3.0 out of 5 stars ( 2 )

$33.17

Sonnax Band Adjustment Screw Kits

Sonnax band adjustment screw kits will prevent band slippage and transmission case breakage. Your OE screws are subject to deflect or bend over time, causing unwanted issues. These screws are made from high-strength, hardened, and tempered alloy steel to prevent problems. They feature stock thread length and are zinc plated to prevent corrosion. Sonnax has a solution to your "weak link"—their strong band adjustment screw kits.

5.0 out of 5 stars ( 1 )

$37.46

Stroud Safety Adjustable Air Regulators

Stroud Safety adjustable air regulators are essential for controlling the flow of CO2. They screw onto the CO2 tank and has two key gauges: one measuring the pressure within the tank and the other showing the pressure being delivered. By adjusting a knob, the regulator allows the user to precisely set the output pressure, ensuring they deliver the correct amount of CO2 for the intended purpose. Stroud Safety adjustable air regulators have a single 1/4 NPT outlet.

Not Yet Reviewed

$129.99

TCI Adjustable Vacuum Modulators

Vacuum modulators are designed to tell your transmission what kind of load is being put on it and react with the proper line pressures and shift points. Over time, these modulators can develop leaks or get damaged, causing driving issues and even premature transmission failure. TCI solves this dilemma with these adjustable modulators. Not only do these modulators renew performance, but you will also have the ability to slightly raise/lower part throttle shift points and line pressures. Simply adjust the screw inside of the vacuum nipple for more or less diaphragm preload.

4.82 out of 5 stars ( 11 )

$28.99

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$43.95

ATI Band Adjustment Screw Kits

ATI band adjustment screw kits are made from 4140 alloy steel and include a jam nut. They are designed to keep ATI steel drum Powerglide, ProGlide, High Impact, and SuperGlide transmissions in good working order. For longevity, it is important to check and properly adjust the low gear band--especially when the transmission is new. A few minutes of maintenance will help the low gear band do its job so that your transmission can deliver performance and durability.

Not Yet Reviewed

$23.99

McLeod Adjustable Height Pistons

McLeod adjustable height pistons help maintain proper mechanical linkage geometry. Each of their offered selections presents three variable height locations—and they utilize angular contact, constant-running bearings for long life and durability. McLeod's adjustable height pistons are exclusive piston replacements for their bolt-on style bearing.

4.0 out of 5 stars ( 1 )

$157.00

RESTOPARTS® Supplied Clutch Linkage Adjusting Rods

RESTOPARTS® Supplied clutch linkage adjusting rods are authentic reproductions to restore proper operation in your classic. Depending on model, these rod kits may include clutch fork pushrod, clutch shaft swivel jamb nuts, and swivel. Numerous styles are available for hundreds of Chevy, Buick, Oldsmobile, and Pontiac applications from the 1960s, '70s, and '80s. Replace worn parts and ensure proper performance—order the clutch linkage adjusting rods designed for your vehicle.

Not Yet Reviewed

$23.79

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$61.99

Strange Adjustable Pinion Preload Spacers

Strange adjustable pinion preload spacers maintain proper bearing preload and allow for yoke removal without altering preload. These kits simplify pinion seal replacement, and allow for a quick adjustment of your shim stack. When you need to make adjustments to your pinion setup, you can count on Strange adjustable pinion preload spacers to eliminate that risk of pinion seal damage and get your vehicle setup just the way you want it. Order the pinion preload spacer kit suited to fit your application needs.

3.67 out of 5 stars ( 3 )

$27.99

Mr. Gasket Adjustable Clutch Fork Pivot Balls

These handy adjustable fork pivot balls from Mr. Gasket allow the adjustment of the release fork height when the clutch assemblies are changed. They're highly recommended for use with Lakewood bellhousings.

Not Yet Reviewed

$49.95

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