Automatic Transmission Valve Bodies
- ACDelco®Genuine GM Parts™ Automatic Transmission Valve BodyGenuine GM Parts™ Automatic Transmission Valve Body by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$80.92 - $1,945.57
- ACDelco®Genuine GM Parts™ Automatic Transmission Drain PlugGenuine GM Parts™ Automatic Transmission Drain Plug by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$6.31 - $10.87
- ACDelco®GM Original Equipment™ Automatic Transmission Snap RingGM Original Equipment™ Automatic Transmission Snap Ring by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$4.07 - $7.00
- ACDelco®GM Original Equipment™ Automatic Transmission Valve BodyGM Original Equipment™ Automatic Transmission Valve Body by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$76.58 - $1,049.94
- Mopar®Automatic Transmission Valve BodyAutomatic Transmission Valve Body by Mopar®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You're in need of...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$4.68 - $2,823.87
- ACDelco®Automatic Transmission Torque Converter Clutch Valve SpringAutomatic Transmission Torque Converter Clutch Valve Spring by ACDelco®. Automatic Transmission Torque Converter Clutch Control Valve Spring. ACDelco GM Original Equipment Automatic Transmission Torque Converter Clutch Valve Spring is a...GM-recommended replacement part for your GM vehicle's original factory componentOffering the quality, reliability, and durability of GM OE$6.55
- ACDelco®GM Original Equipment™ Automatic Transmission Band Servo Piston PinGM Original Equipment™ Automatic Transmission Band Servo Piston Pin by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$6.90 - $20.20
- ACDelco®GM Original Equipment™ Automatic Transmission Clutch Piston DamGM Original Equipment™ Automatic Transmission Clutch Piston Dam by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$6.89 - $61.16
- ACDelco®GM Original Equipment™ Automatic Transmission Clutch Retaining RingGM Original Equipment™ Automatic Transmission Clutch Retaining Ring by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$3.14 - $8.08
- ACDelco®GM Original Equipment™ Automatic Transmission Fluid Level Thermo Valve PinGM Original Equipment™ Automatic Transmission Fluid Level Thermo Valve Pin by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$6.83
- ACDelco®GM Original Equipment™ Automatic Transmission Piston KitGM Original Equipment™ Automatic Transmission Piston Kit by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$14.08
- ACDelco®GM Original Equipment™ Automatic Transmission Torque Converter BushingGM Original Equipment™ Automatic Transmission Torque Converter Bushing by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$11.95
- ACDelco®GM Original Equipment™ Automatic Transmission Torque Converter Clutch Regulator Valve SpringGM Original Equipment™ Automatic Transmission Torque Converter Clutch Regulator Valve Spring by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$7.45 - $24.79
- ACDelco®GM Original Equipment™ Automatic Transmission Torque Converter Valve Stop Retaining RingGM Original Equipment™ Automatic Transmission Torque Converter Valve Stop Retaining Ring by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised....Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$7.79
- ACDelco®GM Original Equipment™ Automatic Transmission Valve Body Cover GasketGM Original Equipment™ Automatic Transmission Valve Body Cover Gasket by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$9.81 - $21.66
- ACDelco®GM Original Equipment™ Torque Converter Clutch Blow Off Valve SpringGM Original Equipment™ Torque Converter Clutch Blow Off Valve Spring by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$5.60 - $8.18
- ACDelco®Genuine GM Parts™ Automatic Transmission Band Servo Piston KitGenuine GM Parts™ Automatic Transmission Band Servo Piston Kit by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$52.90 - $56.09
- ACDelco®Genuine GM Parts™ Automatic Transmission Band Servo Piston PinGenuine GM Parts™ Automatic Transmission Band Servo Piston Pin by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$19.04 - $19.99
- ACDelco®Genuine GM Parts™ Automatic Transmission Clutch Piston DamperGenuine GM Parts™ Automatic Transmission Clutch Piston Damper by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$2.85 - $32.43
- ACDelco®Genuine GM Parts™ Automatic Transmission Reaction Hub and 4-5-6 Clutch Piston Dam KitGenuine GM Parts™ Automatic Transmission Reaction Hub and 4-5-6 Clutch Piston Dam Kit by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised....Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$15.65 - $57.70
- ACDelco®Genuine GM Parts™ Automatic Transmission Torque Converter Vacuum ValveDesigned utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed stringent industry standards.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$9.65
- ACDelco®Genuine GM Parts™ Automatic Transmission Valve Body Cover GasketGenuine GM Parts™ Automatic Transmission Valve Body Cover Gasket by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.29 - $26.89
- ACDelco®Genuine GM Parts™ Manual Transmission Oil Pump Check BallGenuine GM Parts™ Manual Transmission Oil Pump Check Ball by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$5.73
- Mopar®Automatic Transmission Valve Body KitAutomatic Transmission Valve Body Kit by Mopar®. Designed utilizing the latest technology, this product by Mopar features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$189.68 - $1,774.29
- Mopar®Clutch Flywheel CoverClutch Flywheel Cover by Mopar®. Increase the life of your vehicle's transmission by keeping your cooling system in top condition. Replace your faulty transmission cooling component with this highly efficient replacement product and be...The finest quality at a great priceOEM fit and function at a reasonable price$5.62 - $708.40
- Genuine®Automatic Transmission Valve Body KitAutomatic Transmission Valve Body Kit by Genuine®. If your transmission is in need of repair, don't compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain store. On...Designed to restore your vehicle’s transmissionGenuine OE replacement parts from the OE manufacturer$36.42
- ATP®Automatic Transmission Valve Body Cover GasketAutomatic Transmission Valve Body Cover Gasket by ATP®. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made of premium quality materials, it will...OE quality at an affordable priceOE fit and function$0.30
- Original Equipment®Automatic Transmission Valve Body Cover GasketAutomatic Transmission Valve Body Cover Gasket by Original Equipment®. Looking for high-quality replacement parts to restore the performance of your vehicle? Then Original Equipment automotive parts are for you. They are manufactured...Perfect replacement for your damaged or worn out original partMade using high-grade materials for long-lasting dependability$49.32
- Pioneer Automotive®Valve Body KitValve Body Kit by Pioneer Automotive®. Pioneer's line of transmission service and repair products covers the automatic transmission market from A to Z, from Allison to ZF. Pioneer's transmission service parts line is comprised of well...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$33.05 - $272.72
- ATS Diesel Performance®Performance Valve Body AssemblyPerformance Valve Body Assembly by ATS Diesel Performance®. The control center of a transmission is the valve body. It controls transmission operation, torque converter control, shift feel and ultimately, transmission reliability. ATS...Increased Transmission LubricationConverts Electrical Signals into Hydraulic Actions$558.25 - $862.75
The valve body is the automatic transmission’s hydraulic control center. Automatic transmissions use planetary gearsets for all forward gears and reverse. Clutches and bands, applied by hydraulic pressure, are the components used to control the planetary members – the sun gear, outer ring gear, and the planetary gears in between – to shift gears. Transmission fluid that is pressurized by the transmission oil pump flows to the valve body and the pressurized fluid is then directed by the valve body to the appropriate clutches and bands. The valve body in your transmission or related valve body components may be failing if you’re experiencing delayed shifts, hard shifts, improper shift timing, shift flares, or noise. If one or more parts prove faulty, we have the OE quality replacement valve bodies & components to restore transmission performance.
The valve body is a structure containing valves and numerous fluid passageways that is bolted to the underside of the transmission case, just above the fluid pan. It may have multiple sections and is usually installed to the transmission with a separator plate and gasket. Several types of valves are used in valve bodies including check balls, poppet valves and spool valves. Check balls seat on the valve body and separator plate where they allow or block fluid flow. Poppet valves are balls or flat discs with stems that guide opening and closing, and like check balls they also allow or block fluid flow. Spool valves are the most familiar type of valve. Spool valves consist of a stem with large circular sections called lands that fit into bores in the valve body, separated by stemmed areas called valleys. When the spool valve is activated by fluid pressure, spring pressure or linkage, the lands block fluid flow and the valleys allow it.
A typical valve body has a manual valve and valves for enacting specific gear changes, as well as pressure control valves, and depending on model year application may also have other valves including a throttle valve, and a valve for the TCC (Torque Converter Clutch). The manual valve is controlled by the driver via the shift lever and directs fluid pressure to the appropriate clutches and bands when the transmission is placed in Park, Drive, Neutral or Reverse. For example, when the transmission is placed in Drive, fluid is directed to the clutch that controls first gear. For an automatic transmission to shift at the proper time and with the necessary firmness, the load on the engine must be communicated to the transmission. On modern computer controlled vehicles, the transfer of engine load information takes place electronically, but on older vehicles a vacuum modulator or TV (Throttle Valve) cable is used to signal engine load to a throttle valve, and the governor and throttle valve control hydraulic pressure in the transmission.
On older, non-electronically controlled transmissions, the transmission pump supplies fluid to the governor and throttle valve, which in turn direct fluid to the shift valves in the valve body. The transmission output shaft drives the governor, which builds pressure directly in relation to vehicle speed. Under light acceleration, the throttle valve does not have much effect on the shift valve and governor-controlled shifts are earlier and softer. Under hard acceleration, when engine load is high, the throttle valve will act against the shift valve to force governor pressure higher. This delays the shift and supplies higher pressure to the transmission bands and clutches, giving them the clamping power needed to control members of the transmission’s planetary gearset and enact firm, hard shifts. The throttle valve detects engine load via a vacuum modulator or TV cable.
On electronically controlled transmissions, shift timing and firmness are controlled by a computer. Depending on the vehicle, model year and system, the transmission may be controlled by a PCM (Powertrain Control Module), which controls both the engine and transmission, or by a dedicated TCM (Transmission Control Module). A network of engine and transmission sensors and switches provides input to the computer about operating conditions including engine load, temperature, and vehicle speed. The computer uses this input, along with internal programming, to manipulate fluid pressure and flow via electric solenoids in the valve body. There are pressure control solenoids, shift solenoids that direct fluid pressure to the appropriate clutches or bands, and a solenoid that directs fluid pressure to engage the TCC. A solenoid contains a coil of wire with an iron plunger inside. When current is applied to the solenoid it becomes an electromagnet and the plunger changes position. When the plunger moves it opens or closes a valve, allowing or preventing fluid flow.
When shift valves are actuated, pressurized fluid is sent to pistons in clutch packs or servos that apply bands to shift gears. Accumulators are devices in valve bodies that are designed to affect shift feel. An accumulator contains a piston and spring in a bore that is connected at both ends to fluid pressure. When fluid pressure from a shift valve is first applied to a clutch or band, the pressure forces the piston down against the spring, thereby absorbing some of the pressure and preventing a harsh shift. However, under hard acceleration, when there is greater engine torque and more pressure is needed to apply the clutch or band, throttle pressure acts on the opposite end of the piston, preventing easy accumulator piston movement and resulting in a firmer shift.
When the symptoms described in the first paragraph above are experienced on vehicles with computer controlled transmissions, they may be accompanied by a CHECK ENGINE or other malfunction indicator light illuminating on the dash. A scan tool should be connected to the vehicle’s diagnostic link connector to check for diagnostic trouble codes. The cause of the transmission problem may not be in the hydraulic circuits, but with a sensor, actuator, controller or some other part of the electronic control system. Pressure testing can reveal defects in the valves and valve body. If a valve body problem is suspected, it should be disassembled and all components thoroughly inspected for wear, which could be caused by extensive use, poor maintenance or a combination of the two. If the transmission fluid has not been changed regularly, or the transmission has overheated or there is a problem in another part of the transmission, the fluid could have reduced lubricating capabilities and there may be a buildup of varnish and contaminants in the fluid, which can cause sticking or worn valves.
No matter what you’re working on, we have the replacement automatic transmission valve body & components needed to restore long-lasting performance and durability to your transmission. You’ll also find performance components in our store. What can a performance automatic transmission valve body do to your vehicle that a stock one cannot? The main thing is that it quickens up gear changes and modifies the shift points when the gear shift happens. It also makes your driving much smoother with gear shifting that is crisper and more powerful. An upgraded valve body won't just improve your overall driving experience, it will also add more durability to your automatic transmission.
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- Clutch Kits
- Automatic Transmission Oil Coolers
- Transmission Mounts
- Transmission Solenoids, Sensors, Switches & Control Units
- Transmission Filters
- Automatic Transmission Torque Converters
- Transmission Shifters
- Clutch Flywheels
- Transmission Pans, Drain Plugs, Filler Caps
- Clutch Hydraulics
- Transmission Seals & Gaskets
- Transmission Rebuild Kits
- Clutch Linkages
- Clutch Release Bearings
- Transmission Bearings
- Automatic Transmission Flexplates
- Automatic Transmission Oil Pumps
- Transmission Shafts & Gears
- AT Bands & Clutches
- Automatic Transmission Governors, Modulators
- MT Assemblies
- Automatic Transmission Assemblies
- Clutch Pressure Plates
- Clutch Discs
- Transmission Fluids, Oils & Additives