Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Availability
Transmissions & Transmission Parts
Showing In Stock Items. Show All 51 Items.
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.
( 33 )
$21.99
B&M Vacuum Modulators
B&M adjustable vacuum modulators let you adjust your shift points within a range of 2 to 4 mph. With a gold cadmium finish and an O-ring seal to stop leaks, they will look as good as they work.
( 29 )
$49.95
Scott Drake Vacuum Modulators
When your classic isn't shifting properly, Scott Drake vacuum modulators could help. These automatic transmission pieces are a vital component that tells the transmission what kind of load is being put on it, allowing it to react with the proper line pressures and shift points. They are offered to fit directly in the factory location of the current throttle valve in many Ford classics. Improve the performance of your transmission with new Scott Drake vacuum modulators.
( 4 )
$36.54
TCI Transmission Vacuum Modulators
If your transmission is sending up smoke signals, then there could be a problem with your modulator. Replace old factory preset models with TCI adjustable vacuum modulators. These transmission modulators are available for several applications and allow you to fine-tune your shift points and shift feel. Simply adjust the screw inside of the vacuum nipple for more or less diaphragm preload. Your transmission relies on the vacuum modulator to function properly, and you can rely on TCI and their adjustable vacuum modulators for renewed performance and the ability to slightly raise or lower part throttle shift points and line pressures.
( 14 )
$33.95
—
$37.95
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.
( 7 )
$23.14
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.
( 10 )
$27.95
—
$35.95
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
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
Painless Performance 700R4 Converter Lock-Up Kits
These converter lockup kits from Painless give you an inexpensive way to automatically lock up the torque converter in 4th gear, when retrofitting a GM 700R4 transmission into an early non-computer controlled vehicle. The kits include everything you need for an easy installation, and you don't even need a speed sensor! Kit includes: * Vacuum switch * 4th gear pressure switch * Brake switch * Torque converter lock-up solenoid * Wire harness * New transmission pan gasket * Mounting hardware
( 21 )
$209.99
TCI 2004R/700R4 Lockup Wiring Kits
Installation of these TCI 2004R/700R4 lockup wiring kits makes retrofits into non-ECM 700R4 or 2004R vehicles a snap. They allow automatic operation of the TCC in 4th gear under stable engine operation, and disengage the clutch when accelerating or downshifting. A manual override option is also provided. These TCI torque converter lockup wiring kits are constructed from OEM connectors and oil-resistant wire.
( 61 )
$159.95
ATI Torsional Input Shafts
ATI torsional input shafts work like a torsional spring bar--twisting and returning to totally eliminate breakage, while reducing shock loads to the gear train. They are manufactured from top-quality 300M or Vasco for maximum durability. Available for GM Powerglide or TH400 splines, these ATI torsional input shafts will add some reliability to your drivetrain.
( 11 )
$324.99
—
$860.99
FTI Performance Powerglide Input Shafts
FTI Performance offers options for Powerglide input shafts. Their selection allows you to choose the strength and pricing to fit your horsepower and budget. From forged 4340 steel to forged 300M to CNC-machined ER100 that is virtually unbreakable, FTI Performance delivers the level of performance you want and need with their variety of Powerglide input shafts.
( 7 )
$189.00
Summit Racing™ Torque Converter Lockup kits
Summit Racing™ torque converter lockup kits are a simple way to control converter clutch lockup in 4th gear when swapping a GM 700R4 or 200-4R transmission in an early non-computer controlled vehicle. The adjustable vacuum switch will hold the clutch on during steady state cruising and disengage when accelerating or downshifting. Summit Racing™ torque converter lockup kits are available in automatic (+12V applied via vacuum switch) and manual (+12V applied via toggle switch) versions. Choose the one preferred for your application.
( 6 )
$89.99
—
$149.99
ATP Automatic Transmission Modulator Valves
Improve slow, sloppy shifts with the addition of ATP automatic transmission modulator valves. These valves will keep your transmission shifting on cue, according to load. ATP adjustable replacements allow you to optimize shift points to meet vacuum load and improve gas mileage and performance. A bad modulator valve can be bad news for your transmission. Get control of your transmission for proper shifting of increased or decreased engine vacuum loads. Replace improper working valves with ATP automatic transmission modulator valves.
( 50 )
$10.99
—
$47.99
TransGo Automatic Transmission Modulator Conversion Kits
Great for transplants! TransGo Automatic transmission modulator conversion kits provide a more aggressive and tunable pressure boost curve with engine vacuum instead of the vehicle PCM controlling PCS/EPC solenoid. TransGo modulator conversion kits include everything needed to add the internal modulator system with the oil pan off the transmission. From the outside of the transmission, you will need to connect it to an intake manifold vacuum source, however hardware is not provided for this. The kits do come with an oil pan-based resistor to pacify the control module for the missing EPC solenoid in applications where the computer will still manage the gear changes. TransGo includes: * Pressure regulator valve spring and snap ring * Brass fitting * Vacuum modulator, pin, valve, and bushing * Hold-down bracket * Elbow vacuum hose and spring * Four short zip ties * Five long zip ties * Vacuum tee * Resistor
( 2 )
$123.57
—
$135.14
TransGo Automatic Transmission Valve Body Repair Kits
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 )
$75.86
—
$81.91
TCI StreetFighter Automatic Transmission Packages
TCI StreetFighter automatic transmission packages are durable enough to withstand the rigors of even the toughest street machines. Using the highest quality TCI manufactured components, each StreetFighter package is equipped with an automatic valve body, most units allow you to manually shift the vehicle into each gear change or, by placing it in the drive position, remain fully automatic. This gives you racetrack shifts and shaves time off your ETs. Each transmission goes through a variety of tests to verify that internal fluid pressures and shift characteristic match TCI's strict quality control standards. For the system to operate properly, all throttle linkage, vacuum lines and kick-down components must be connected. Each transmission package consists of a triple-tested TCI transmission and precision-tuned torque converter, a universal transmission cooler and premium TCI RTF transmission fluid. These packages are available with a variety of transmission models and other performance options. Choose the package for your application needs.
( 17 )
$2,700.95
—
$5,119.95
Tremec Magnum-F Manual Transmissions
Tremec introduces the Magnum-F 6-speed manual transmissions for fourth-generation Camaros and Firebirds. Designed to replace T-56 transmissions in 1998-2002 GM F-body cars, the Magnum-F leverages Tremec's pervasive TR-6060/Magnum architecture in order to provide fourth-gen enthusiasts significantly improved performance and relief from a shrinking pool of quality T-56 replacement parts. Born in the vacuum created by the release of the original T-56 Magnum (now known simply as 'Magnum') back in 2009, the Magnum-F fills a longstanding void in the overall Magnum line with regard to shifter locations—addressing not only LS1-powered '98-'02 F-bodies, but several other applications that utilize a similar shifter position. Beneficiaries include third-generation F-bodies, LT1-powered fourth-gens, LS-swapped late models of all varieties, and sport compact applications such as A80 Supras, FD RX-7s, and more! Where the original Magnum shifter locations may prove too far forward, and the extended length Magnum XL's too far back, the Magnum-F's in-between position often proves to be just right. Inside, the Magnum-F benefits from the same durable componentry found in many of today's hardest hitting OEM muscle and sports cars. Over the T-56, the Magnum-F transmissions boast increased face-width on all gears, a robust combination of double and triple cone synchronizers, enhanced webbing in the main case, provisions for a cooler circuit, and more! Tremec also took the opportunity to upgrade the shifter to an isolator-type unit, like that found on its Magnum XL. The shifter reduces in-cabin noise and vibrations, while at the same time providing the precise and communicative shift feel that all Magnums are known for. And, like all Tremec aftermarket transmissions, the Magnum-F is made from 100 percent brand-new OEM-quality content. Models with different gear ratios are available. Additional notes: * Close Ratio version for high performance street and road racing * 700 lbs.-ft. of torque capacity * Reasonably light at 135 lbs. dry * Multiple shifter locations and dual speedo pickups for unmatched versatility * Choice of two different gear ratio sets with unique double overdrive ratios * Incredibly short, extremely low-effort shift throws, with crisp, precise engagement * Modern OE supercar technology for the ultimate pro-tourers, road-racers, and more
( 11 )
$3,545.00
Bowler Performance Lock-Up Control Modules
Bowler Performance lock-up control modules come complete with everything needed to seamlessly control your torque converter lock-up. Converter lock-up will occur 8 to10 seconds after 4th gear engagement, allowing enough engine rpm gain before lock-up, giving your engine more performance and providing a better feel to lock-up. Bowler's lock-up modules only require one 2 amp fused 12 V wire to operate. No vacuum switch is necessary allowing these modules to function correctly with all types of engines, and there are no bulky boxes to hide or mount. The control modules have the GM 4-prong connector integrated onto the control board, and are epoxy coated to stay protected against the elements. Choose the kit designed for your transmission. Kits include: * Lock-up control module * Internal wiring harness with lock-up solenoid and mounting studs * Pressure switch * Pan gasket * New transmission filter * Case pass through connector * Brake light switch—standard that has a normally closed switch (for your lock-up module) and a normally open switch (for your brake lights). The brake switch does not have to be installed for the lock-up module to function, but will allow the driver to tap the brake to un-lock the converter at any time. If you are going up an incline and need a few more rpms to get up that hill, just tap the brake, and the lock-up will turn off and not re-engage for approximately 8 seconds. For those with a high-gear ratio and late down shifts who experience a chug of the motor due to the lock-up converter still being engaged; the switch will eliminate this concern.
( 10 )
$229.99
Transmission Specialties Billet Aluminum TH400 Valve Bodies
Transmission Specialties billet aluminum TH400 valve bodies use zero OEM stock parts—everything is brand new! Unlike many production builders, TSI's valve bodies are handcrafted from beginning to end by one highly skilled and experienced technician. This process ensures that you get the highest quality product each and every time. The valve body has undergone over 40 years of contiguous, rigorous R&D and on track testing. For over 40 years, Transmission Specialties has been the trusted name in the performance automatic transmission industry. They have pioneered much of the technology that is now commonplace in the transmission marketplace. The inventors of the spragless converter and the aftermarket straight cut Powerglide planetary, TSI is known worldwide for manufacturing the highest quality transmissions and components. Product features: * Billet 6061-T6 main and small valve body construction, no steel * Laser-cut aluminum separator plate * TransGo custom heat treated, USA Made valves * TransGo custom springs * Proprietary hydraulics and worm tracks * Proprietary TransGo Pressure Regulator valve train assembly * Bores are concentric to .0003 in. insuring perfect valve operating * All parts of the valve body are within .001 in. flat and parallel * Micro RA finish ensures zero leaks and maximized fluid movement * Custom bolt pattern eliminates leaks that are common in PG valve bodies * Weighs less than 8 lbs. fully assembled * Ultra-Fast brake release is achieved with our custom hydraulic and plate design * Includes NEW transbrake Solenoid * Includes 17 precision matched reverse release springs * Best fitting and performing valve to bore design in the industry resulting in near perfect vacuum test results * Grade 8 fasteners
Not Yet Reviewed
$563.28
Sonnax Feed Limit Low Valve Kits
The feed limit low valve in listed GM transmissions limits line pressure feed to the default disable solenoid and control valves. Feed limit low pressure is also connected to the boost ball system for "A" and "B" clutch control. This feed limit low valve is subject to significant side-load force, resulting in severe wear and pressure loss to the default disable solenoid and connected control valves. Such pressure loss can put the vehicle into default mode at high speeds, resulting in momentary wheel lockup, sudden downshift to 2nd gear, harsh shifts or a P0747 code. The feed limit low valve can wear out in as little as 30,000 miles, with many vehicles requiring service by 35,000 miles. A national recall from GM includes installing updated software that monitors valve performance and wear, then triggers a check engine light and reduced propulsion message 10,000 miles before failure. Vehicles are then limited to 5th gear, commonly referred to as limp mode, until the valve body is serviced to address the failed valve. Sonnax patented this drop-in feed limit low valve kit to overcome bore wear, restoring proper valve function immediately without the need or expense of replacing the entire valve body. The valve reroutes the balance circuit through an internal passage, significantly reducing the side-load force, while upgraded materials prevent future wear. * The kit overcomes drivability issues related to the GM 10-speed wheel lockup recall * Patented valve and sleeve combination overcomes bore wear and significantly reduces future side loading of the valve * Hardcoat anodized aluminum valve and wear-resistant sleeve combat premature wear * Drop-in Zip Valve parts install quickly and easily * Kit contents: -- Valve -- Sleeve -- Spring -- Retainer -- Drill -- Rivet (Note: The OE feed limit low valve is susceptible to premature wear and therefore a critical failure point. Replacing the valve is recommended even if the transmission isn't exhibiting problems and the valve passes a vacuum test.)
Not Yet Reviewed
$26.99
ATP Automatic Transmission Master Repair Kits
ATP automatic transmission master repair kits enable you to conveniently rebuild and restore performance. They include everything needed to give your transmission new service life—including clutch plates, gaskets, seals, O-rings, and (depending on your application) they may include an oil filter, bushings, or even a vacuum modulator. If you have transmission work to perform, let the pros at ATP furnish the master repair kit designed for your model.
( 45 )
$100.99
—
$339.99
ATP Automatic Transmission Shift Control Solenoids
ATP Automotive now offers the widest product offering of automatic transmission control products for the vast majority of import and domestic vehicles. ATP has the best coverage, as well as the highest-quality solenoids, pressure and speed sensors, pressure switches, wire harnesses, and vacuum modulators. ATP automatic transmission shift control solenoids are exact-fit, no-compromise replacement parts. They are manufactured to meet or exceed OEM specifications.
Not Yet Reviewed
$162.99
ATI Compu-Flow Reverse Manual Valve Bodies
ATI Compu-Flow reverse manual valve bodies shift opposite of the OEM units, away from neutral when up-shifting (P-R-N-1-2-3). There is no automatic shifting. They will remain in the selected gear, allowing street-driven cars to move off in 2nd or 3rd gear in slippery conditions. The governor and related components are eliminated, as well as throttle pressure, cables/vacuum lines, and linkages. All units freewheel if you lift in low gear; there is no engine breaking. (Note--all turbo units freewheel in 2nd gear, except #353400 for the T-350.) These valves are not recommended for the Powerglide, since it must pass through low to get to neutral.
( 1 )
$308.99
