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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.
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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Pacific Performance Engineering Transmission Fluid Bypass Valves
Pacific Performance Engineering offers automatic transmission fluid bypass valves for a variety of applications. The OEM part has restrictive internal passages; and when the OEM valve fails in the open position, transmission fluid doesn't reach your cooler. This can be caused by mechanical failure or debris. The result of stock valve failure can cause the transmission to dangerously overheat. Without properly cooled transmission fluid, the demands of towing and rigorous stop-and-go driving conditions shorten the life of transmission components. This PPE bypass valve eliminates the mechanical valve—which maximizes fluid flow from the transmission cooler. For further protection, a Neodymium magnet-equipped service plug has been added. The removable plug traps ferrous debris and can be accessed to remove particles from the system. The factory part does not have this feature. Additional notes: * Billet aluminum construction * Neodymium magnet-equipped service plug with O-ring * Easy to install * Limited lifetime warranty
( 22 )
$71.99
On Sale
BD Diesel Transmission Cooler Bypass Valve Delete Kits
BD Diesel has been a leader in heavy-duty powertrain components since 1972. They focus on getting the most power and durability out of your diesel-powered truck—and to help eliminate costly transmission failure, they offer these transmission cooler bypass valve delete kits. The factory cooler valve can be stuck in recirculation mode if any type of debris jams the internal valve; this will increase temperatures dramatically and cause transmission failure. These cooler bypass delete valves always keep transmission fluid flowing to the cooler regardless of speed or load of the truck—ensuring your transmission will stay cool and eliminate costly repairs. Look to BD Diesel to push your truck to be all it can and should be. Order the kit recommended for your vehicle, engine, and transmission application.
( 3 )
$118.95
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$120.95
$107.06
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$108.86
TransGo Vacuum Bypass Kits
Too much line pressure can cause damage to various parts under the hood of your vehicle. TransGo vacuum bypass kits will run vacuum to the transmission, even set to full manual. Not doing so will put excessive strain on your pump, seals, and engine thrust bearing. Bypass units are for use on engines with a vacuum modulator that are supercharged or turbocharged—to prevent increased boost from causing runaway line pressure.
( 8 )
$24.30
ATI Modulator Plug Hold-Down Clamps
ATI modulator plug hold-down clamps replace the OEM clamps on your T400. You no longer have to reuse or spend time trying to find these commonly worn-out parts for your build. ATI modulator plug clamps are exact or better-than OE-style replacements, and they will mate perfectly with other OE parts and competition-type shifters without modifying the case. Don't let an old small part ruin your new racing transmission. ATI has exactly what you need for a successful build.
( 3 )
$7.99
FTI Performance Billet Modulator Plugs
FTI Performance billet modulator plugs block off modulator vacuum supply. An O-ring or gasket is included with each plug. Order the model recommended for your transmission application.
( 2 )
$12.29
ICT Billet Modulator Delete Plugs
ICT Billet modulator delete plugs allow you to retain the factory modulator valve and lock it into place. They're designed to be used with manual valve bodies. Made from strong billet aluminum, these plugs will not leak or have problems lasting the life of the transmission. Order the model recommended for your transmission make and type.
( 1 )
$13.99
Mishimoto Thermal Bypass Valve Kits
Mishimoto thermal bypass valve kits improve upon the failings of stock models that can cause your transmission to overheat. Crafted from CNC-machined billet aluminum, the valves look better and perform better with a fully serviceable 160 degree F thermostat for fast warm-up in cold climates and a thermostat bypass for constant cooling in hot climates. They deliver increased flow over stock models and feature machined cooling fins for added heat dissipation and a durable anodized finish. These thermal bypass valve kits are backed by Mishimoto's Lifetime Warranty.
Not Yet Reviewed
$99.95
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$204.95
ATS Diesel Performance Cooler Bypass Delete Kits
ATS Diesel Performance cooler bypass delete kits are designed to help keep your transmission cooler, while also protecting seals and ensuring a more trouble-free operation. Over time, the bypass can malfunction and cause fluid to bypass the cooler. Eliminating this component with an ATS delete kit assures that all the fluid flows through the cooler. Order the model recommended for your vehicle, engine, and transmission application.
( 2 )
$94.99
On Sale
BD Diesel Bypass Tube Eliminator Kits
BD Diesel bypass tube eliminator kits allow for the removal of the problematic OEM cooler bypass tube assembly. This is a handy preventative maintenance item—especially useful when installing transmissions, coolers and filter kits, or for performing general service work. BD Diesel cooler bypass eliminator kits are easy to install and are a must for heavy towing applications. Order the model recommended for your vehicle.
( 3 )
$36.95
$33.26
Sonnax Automatic Transmission Cooler Bypass Valve Kits
Sticking of bypass components, spring relaxation, or poor ball seat in Ford 4R100 and E4OD units will allow the bypass to open at lower cracking pressure. This reduces TCC (Torque Converter Clutch) apply pressure, cooler flow at the overdrive section, and radiator flow responsible for heat transfer. Sonnax automatic transmission cooler bypass valve kits allow the bypass valve assembly to be rebuilt, salvaging the OE fittings and maintaining cracking pressure at 70 to 75 psi. Features: * Hardened steel T-valve provides secure check ball seat and adequate bypass flow * New spring cracks open at 70 to 75 psi to provide lube if cooler is blocked or restricted * Hardened alloy steel check ball resists damage * Seven new O-rings provide positive seal for cooler circuit * Drop-in Zip Valve parts install quickly and easily Contents: * T-valve * Spring * Check ball * O-rings -- One small -- Two medium -- Two large -- Two extra-large
( 1 )
$19.99
Pacific Performance Engineering EPC Blockers
Pacific Performance Engineering EPC blockers solve a big problem with the 2011-19 Allison 1000 transmission ... low mainline pressure. Mainline pressure is created by the transmission's oil pump, directed by the valve body to the applied pistons, and creates clamping force on the clutch packs, allowing them to clamp quickly and completely. Reduced or not having enough mainline pressure at the right time means reduced clamping force—not enough to hold the torque of the engine, and when clutch packs slip, they generate excessive heat, destroying the clutch pack material. The stock EPC functions to modulate line pressure. During a shift, the transmission control module commands the EPC to vary mainline pressure. The pressure will rise from 80 up to 230 psi, then after the shift, the pressure drops back down to 80 psi, and at 80 psi the clutch packs don't hold the torque of the engine. Towing heavy loads or adding aftermarket upgrades adds even more stress on the clutch packs. PPE's EPC blocker kits quickly install between the EPC solenoid and the valve body. There is no need to remove the valve body, just drain the transmission fluid, remove the oil pan, and install the EPC blocker. Once installed, the EPC blocker will allow all the available mainline pressure, up to 230 psi, to always reach the applied pistons and clutch packs. An easy alternative to transmission line pressure tuning, you can improve shift quality and increase the ability to hold more horsepower with Pacific Performance Engineering EPC blockers.
Not Yet Reviewed
$49.49
ATI Modulator Plugs
ATI modulator plugs are designed to replace the vacuum modulators. These aluminum plugs are used with manual valve bodies and include O-rings. Order the model recommended for your automatic transmission application.
( 2 )
$17.99
Sonnax Vacuum Modulator Plug Gaskets
Sonnax offers vacuum modulator plug gaskets for a variety of applications, including GM Powerglide automatic transmissions. These replacement seals are manufactured from factory materials and specifications to ensure proper fitment and long-lasting performance. Sold in sets of 5.
Not Yet Reviewed
$7.00
Sonnax Vacuum Modulator Plugs
When building a racing Powerglide, it's necessary to plug the hole left by the vacuum modulator. Sonnax vacuum modulator plugs for the GM Powerglide transmission are made from anodized aluminum, and the gasket is included.
( 1 )
$24.01
Dorman Transmission Control Modules
Dorman transmission control modules have been thoroughly tested to offer the same function and performance as the stock component, electronically controlling the vehicle's automatic shifting for far less than replacements at the dealer.
( 2 )
$415.99
Z Automotive Jeep JL/JT Z-Locker OEM Controller Harnesses
The locker sensor in Wrangler JL and Gladiator Rubicons have started to become problematic. When they fail, it usually starts out as a blinking locker indicator on the dash, which then ends up in a "service axle locker" message and the lockers will no longer engage. The repair would normally be to replace the sensor or the locker assembly, but they are not available, so the entire axle assembly needs replaced. Developed in a partnership with Americas Most Wanted 4X4, Z Automotive Jeep JL/JT Z-Locker OEM controller harnesses provide a simple fix for faulty OEM axle locker. Each harness will bypass the problematic sensor, allowing the locker to operate without the position sensor and provide the proper feedback to the Jeep's computers to keep the system operational without any errors or warnings. You get fully functioning lockers with no side effects. Installation is simple and they will not harm the Jeep's computers as they use the same signaling that it expects from the sensor. The connectors are the same ones used by Jeep and are watertight.
( 29 )
$179.00
Caspers Electronics Skip Shift Eliminators
Casper Electronics skip shift eliminators bypass the computer-aided gear selector feature (first to fourth gear) on newer GM 6-speed transmissions. They are OBD-II compatible, and installation is a simple unplug and plug-in. Available for late model cars, the Caspers Electronics skip shift eliminators will let you drive your car the way you want.
( 14 )
$17.99
TransGo Automatic Transmission TFSC Shift Kits
TransGo automatic transmission TFSC SHIFT KIT Valve Body Repair Kits (P/N SKTFSC) fit 1960 and newer Chrysler, Dodge Plymouth, AMC, and Jeep vehicles with both small case 3-speed transmissions (such as the A904, A998, A999, TF6 and 30RH), as well as big case 3-speed transmissions (such as the A727, TF8, 36RH and 37RH) with or without lock-up. Common complaints on these transmission are soft shifts, loss of power on launch, pump bushing burn-up, TC clutch failure, stalls in reverse when hot, converter hub failure, and torque converter drain-back. * Features and benefits: The Shift Kit includes valve body components and modifications designed to deliver short smooth shifts and a better TC clutch apply. There are several innovative components in this kit. For instance, the line-to-converter feed system which helps the unit run cooler and promotes longer TC clutch life. Also included is a TransGo pioneered manual valve to reduce overnight forward and reverse delayed engagement complaints due to torque converter drain-back. Lastly, the kit can be installed with the transmission in the truck. * Corrects/Prevents/Reduces: -- TCC slip or shudder -- Reduces converter drain-back -- Soft shifts -- Loss of power on launch -- Converter hub failure -- Pump bushing failure * Includes: -- USA-made hardened steel manual valve with converter charge in park provision *(fits 1966 an dlater only) -- Mumbly peg (for easy detent spring and ball installation) -- PR valve shim, spring seat and inner spring for line-to-converter feed provision as well as outer spring for increased pressure -- Bypass valve spring -- Bypass ball spring -- Converter regulator valve spring
( 1 )
$30.86
JET Skip Shift Eliminators
Jet skip shift eliminators bypass the computer aided gear selector feature (first to fourth gear) on newer GM six speed transmissions. These units are OBDII compatible, and installation is a simple unplug and plug in.
( 35 )
$38.99
FTI Performance Torque Converter Dump Valve Kits
FTI Performance offers torque converter dump valve kits for a variety of transmission applications, including the GM Powerglide. Typically used in drag racing, a properly designed, tuneable dump valve system lowers the oil level in the torque converter by bypassing charge oil back to the oil pan causing cavitation within the converter. This cavitation reduces the forward thrust generated by the converter against the flexplate—which helps to reduce engine thrust bearing wear, increase available stall speed, engine responsiveness and boost response/transition while staging against a transbrake in forced induction applications.
Not Yet Reviewed
$569.00
On Sale
BD Diesel Transmission Inline Filter Kits
BD Diesel's transmission inline filter kits protect your heavy-duty automatic transmission against contamination in its transmission fluid. They eliminate contamination from prior transmission failure or excessive wear, as well as secondary damage to other parts once a part failure has occurred. They extend transmission life by minimizing wear and preventing the sticking and scoring of sensitive shift control valves. The added oil capacity adds cooling capacity, and an off-the-shelf oil filter has a bypass valve and prevents the formation of sludge that blocks passages. These kits are designed for an easy installation and come complete with all needed hardware, including large hoses and fittings that result in high gpm levels, even under extreme use.
( 1 )
$314.95
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$349.95
$283.46
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$314.96
ATP Automatic Transmission Inline Magnetic Filters
Protect your transmission from metallic debris with ATP inline magnetic transmission filters. You'll have no more clog worries with these lightweight, compact aluminum filters. Utilizing a fine mesh filter element and magnet, ATP inline filters trap harmful debris. These filters feature a pressure-activated bypass mode to ensure lubricant flow, even if the filters are full. They also feature a high performance magnet to attract and hold harmful ferrous particles and selective filtration to trap large metal particles without reducing flow. Available for several applications, the universal models also fit your power steering return hose! These filters install in minutes and include hoses and clamps for a secure fit. Do the job right, with help from ATP inline magnetic transmission filters.
Not Yet Reviewed
$24.99
Sonnax Clutch Piston Lip Seals
Sonnax has the automatic transmission rebuild components you need to return your tranny to optimum performance, including clutch piston lip seals. Maintaining proper fluid pressure is crucial for smooth clutch application and efficient transmission operation. These clutch piston lip seals primary purpose is to prevent transmission fluid from leaking past the clutch piston, ensuring proper hydraulic pressure is maintained to effectively apply the clutch in a transmission system; essentially, it seals the piston to the clutch housing, preventing fluid bypass and ensuring smooth clutch engagement.
Not Yet Reviewed
$8.42
ACDelco Transmission Bellhousings
ACDelco offers transmission bellhousings for a wide range of vehicles from the 1990s and up. Built from aluminum, these GM-recommended replacements deliver the quality and durability of original equipment, plus a factory fit and solid performance. The bellhousings are available for nearly two dozen transmission models. Order the unit designed for your application.
( 7 )
$251.99
