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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.
( 31 )
$21.99
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.
( 27 )
$48.35
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 )
$35.65
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.
( 7 )
$23.95
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$35.95
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.
( 13 )
$33.95
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.
( 47 )
$25.79
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$45.79
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 )
$20.10
These Standard Motor automatic transmission modulators are designed to replace faulty factory units and help restore your factory shift points. They are available for a variety of applications.
Not Yet Reviewed
$27.99
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
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
Transmissions showing symptoms of soft shifts from 1-2 or 2-3, periodic harsh shifts, or low line rise may be able to correct the problems with one of these Sonnax Line Pressure Modulator Plunger Valve kits. When sleeves become worn, electronic pressure control (EPC) oil can leak past the valve to cause the soft shifts; valves will also stick or hang up through wear, leading to the rough shift issue. Sonnax kits include a replacement modulator sleeve made from carbon steel to combat extreme wear, along with a durable plunger valve crafted from hardened alloy steel. The O-ring helps to prevent EPC oil loss. Sonnax Line Pressure Modulator Plunger Valve kits are produced for fitment on a variety of transmissions, including 6 and small 8-cylinder applications. Select the kit that's tailored to your vehicle.
( 1 )
$28.04
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$42.14
ACDelco Gold automatic transmission modulators are premium aftermarket replacements for your faulty factory units, helping to restore your factory shift points. They're manufactured to meet or exceed your expectations for fit and performance--and are available for a variety of applications.
Not Yet Reviewed
$36.99
Raybestos R-Line wheel hub assemblies are designed to OE specifications—and tested for endurance, temperature control, hydraulic and salt resistance, as well as metallurgical integrity and vibration. This ensures Raybestos R-Line assemblies deliver a long service life with consistent performance that's quiet and safe. Order the model designed for fitment on your vehicle application.
( 20 )
$45.99
ICT Billet skip shift delete plugs replace skip shift solenoids found on many 6-speed transmissions. Although they have their uses, many people find computer-aided gear selection (CAGS) solenoids to be a hassle. Now you can enjoy driving your vehicle again without the annoying "skip shift" requirements from your electronic control module (ECM). Shift into any gear at any time with the aerospace-grade ICT Billet CAGS solenoid delete plug!
Not Yet Reviewed
$22.99
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
$29.99
ATP automatic transmission control solenoids are designed to replace faulty factory units and keep your transmission shifting smoothly. They're available in a variety of configurations for dozens of transmission types—on thousands of vehicle applications. These replacement solenoids meet or exceed OEM specifications.
( 1 )
$26.79
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$33.99
Replace worn or damaged wheel bearing components on your vehicle for improved performance and longer tire life with Beck/Arnley wheel bearings. These replacement bearings are designed and built to OEM specifications to replace the originals perfectly and are offered in various applications to suit your vehicle.
( 11 )
$51.99
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