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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FTI Performance TH400 direct drum HP spring kits are heavy-duty, high performance springs—a must for high-rpm applications. Servicing or rebuilding your TH400 automatic transmission can be a big job. Make it easier by choosing quality parts you can count on to fit and perform—FTI Performance direct drum spring kits.
Not Yet Reviewed
$29.99
RESTOPARTS® Manufactured clutch return springs are offered individually or in sets. The sets include the large clutch return spring that goes from the Z-bar to the frame bracket, and the smaller anti-rattle spring that goes from the Z-bar to the clutch fork (on some applications) to keep the components from making noise. These replacements are available in different configurations for a variety of 1960s and '70s era GM vehicles. Order the springs recommended for your application.
( 1 )
$18.99
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$44.99
Crown Automotive clutch fork return springs will provide OE fitment and function. The proper movement and pressure of your clutch components depend on the many springs involved. No matter which throwout fork or lever springs you need for your classic rig or newer ride, Crown can help keep your clutch in optimum operation for smoother shifts. Choose your replacements from the selection of Crown clutch return springs for improved performance.
( 17 )
$2.99
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$3.99
Need to solve your slow-moving servo? Sonnax servo return springs are your answer. Available in several spring rates makes tuning your transmission easier than ever. Made from high quality materials, these springs will provide consistent performance you can trust.
( 3 )
$15.14
TCI's pressure regulator springs are a high-rate style that will permit pressures up to 250 psi, depending on boost valve selection. They're perfect for competition transmissions.
( 2 )
$20.95
These Powertrax differential spring rebuild kits are designed to keep your locker operating smoothly. They include the necessary springs for installation. The rebuild kits are available for the Lock-Rite and No-Slip carriers.
( 29 )
$12.99
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$19.99
Restore proper shift feel with Sonnax accumulator springs. The replacement piston release springs have the identical performance specifications as the purple OE accumulator springs but are made of high-strength material to ensure lasting spring life and reduce spring relaxation. Order the spring set designed for compatibility with your automatic transmission make and type.
( 5 )
$4.62
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$9.90
Sonnax enhanced performance accumulator springs provide firmer 1-2 shifts for enthusiasts who appreciate quick, positive shift feel in their GM units. The design of these springs provides a performance shift feel, without reducing accumulator piston travel. This allows for a firmer—but still cushioned—shift that minimizes shock to the band and shafts. These springs also may be used as a replacement for THM 350 direct accumulator piston springs. Hit the road enjoying the perfect shift feel with Sonnax enhanced performance accumulator springs.
( 2 )
$12.38
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$25.91
FTI Performance offers a wide range of replacement parts for racing transmissions—from high gear drums and servo covers, to reverse piston drums, shifter detents, and more. These Powerglide reverse instant action spring kits quicken the piston release during trans-brake use.
Not Yet Reviewed
$27.99
FTI Performance automatic transmission servo springs are available for racing applications, such as the Turbo 400 model (TH400). These high-pressure regulator springs are quality replacements parts for your repair or rebuild project.
Not Yet Reviewed
$9.99
These TransGo 3-4 and forward clutch spring kits are a necessity for use over 5400 RPM. They function by preventing centrifugal apply and also allow easier downshifts. Best of all, they will function with original or additional amounts of clutches.
( 3 )
$35.76
Goodmark clutch fork return springs are designed to provide the correct tension on your clutch fork. Built from durable steel with pre-bent hooks on each end for easy installation, these small replacement return springs are just what you'll need when servicing clutch components on your classic muscle car. Spring models are available for hundreds of applications from the 1960s, '70s, and '80s.
( 10 )
$9.99
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$13.99
Sonnax 3-4 clutch boost springs offer a low-cost, direct replacement alternative to the OE springs in GM 4L60, 4L60-E, 4L65-E and 4L70-E automatic transmissions. Engineered for the application, the 77763-01 boost springs are precision manufactured from high-quality spring materials.
( 1 )
$9.19
Mopar Replacement clutch fork return springs will maintain the tension between your fork and adjusting rod. They are manufactured from durable, quality materials, just like the originals, to fit and function just like the originals. Choosing genuine Mopar parts also supplies the confidence that you have the right part, with the right fit, and the right performance to restore and/or repair your Chrysler, Dodge, or Jeep properly.
Not Yet Reviewed
$8.99
If you're swapping in a manual transmission, then you'll need one of these Advance Adapters clutch fork return springs. They'll help you achieve the proper tension for your clutch fork assembly. The springs are made from heavy-duty steel for durability, and most are designed for universal fitment.
( 1 )
$10.41
These springs from TCI are a complete set of 16 direct piston release springs to quicken the release during trans-brake use. You can count on TCI to keep your valve body and trans-brake working flawlessly.
( 2 )
$47.95
FTI Performance pressure regulator springs are great for competition transmissions. These high-pressure springs will help improve your tranny's performance.
( 1 )
$7.99
OER clutch fork return springs are excellent reproductions of the original springs. These springs are the return for your clutch fork. You can depend on OER for the components needed for proper clutch function on a wide variety of makes and models spanning a half-century.
( 5 )
$8.99
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$12.99
Worn or weakened OE accumulator springs may cause delayed or sluggish shifts between 1st and 2nd gears. Installing Sonnax heavy-duty 1-2 accumulator spring kits restore shift feel, even in demanding towing applications. These stronger-than-OE springs improve overall performance, reliability, and longevity of your automatic transmission. Each kit includes an inboard (green) and outboard (yellow) spring.
Not Yet Reviewed
$21.81
ATI Performance offers a variety of transmission parts and accessories, including servo reverse release springs. These heavy-duty replacements are a must with valve bodies that have the 2nd gear trans-brake option. They make the rear band release much faster than the OE spring.
( 1 )
$4.49
ACDelco GM Genuine Parts automatic transmission accumulator piston springs are factory-recommended replacement components. They will provide the same performance, durability, and service life you expect from General Motors. Order the springs designed for your transmission application.
Not Yet Reviewed
$6.99
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$18.99
These OER clutch fork return spring extension rods are designed to connect the clutch fork to the engine support bracket. They attach easily and are built to the correct length for a direct fit. The rods are made from quality materials and are built to factory tolerances for a simple installation.
( 1 )
$6.99
CA offers clutch fork anti-rattle return springs for a variety of applications, including many Chevy Corvette models from the 1950s, '60s, '70s, and '80s. These manual transmission replacement parts are made from factory materials and specifications to ensure proper fitment and performance. They're designed to meet or exceed OEM standards.
Not Yet Reviewed
$4.99
Leaf springs rest on a spring perch, supporting the leaf spring and your vehicle's suspension system. Over time these pieces can become bent, damaged, or collapse. Replace yours with Racing Automotive Group leaf spring perches. Their weld-on leaf spring pads feature high-strength steel construction to provide the support needed.
Not Yet Reviewed
$8.99
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