Transmission Solenoids, Sensors, Switches & Control Units

Transmission Solenoids, Sensors, Switches & Control Units
  • Mopar® - Automatic Transmission Control Solenoid Module
    Mopar®Automatic Transmission Control Solenoid Module
    1
    # sp107455
    Automatic Transmission Control Solenoid Module 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
    $10.64 - $519.17
  • Mopar® - Clutch Starter Safety Switch
    Mopar®Clutch Starter Safety Switch
    0
    # sp203852
    Clutch Starter Safety Switch 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...
    The finest quality at a great priceOEM fit and function at a reasonable price
    $20.73 - $247.40
  • Mopar® - Vehicle Speed Sensor
    Mopar®Vehicle Speed Sensor
    0
    # sp107532
    Vehicle Speed Sensor 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 clutch/transmission...
    OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
    $6.13 - $989.16
  • Genuine® - Automatic Transmission Control Solenoid
    Genuine®Automatic Transmission Control Solenoid
    0
    # sp180777
    Automatic Transmission Control Solenoid 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
    $36.67 - $1,048.98
  • Genuine® - Automatic Transmission Shift Solenoid
    Genuine®Automatic Transmission Shift Solenoid
    0
    # sp180784
    Automatic Transmission Shift Solenoid 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....
    Designed to restore your vehicle’s transmissionGenuine OE replacement parts from the OE manufacturer
    $38.88 - $231.70
  • Motorcraft® - Speed Sensor
    Motorcraft®Speed Sensor
    0
    # sp104888
    Speed Sensor by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM quality without the...
    Direct OEM replacementMeets strict Ford Motor Company standards
    $20.34 - $2,529.80
  • Holstein® - Vehicle Speed Sensor
    Holstein®Vehicle Speed Sensor
    0
    # sp207247
    Vehicle Speed Sensor by Holstein®. Cutting edge design. OE Replacement Parts You Can Trust. Vehicle Speed Sensors measure wheel speeds and provide this information to the vehicles ECU (Electronic Control Unit). The ECU the calculates...
    Holstein focuses on using only the highest quality materials, manufactured to exacting standards for an aftermarket product that is truly built to match or exceed the OE partHolstein Wheel Speed sensor line has superior coverage for domestic and import applications
    $11.17 - $181.31
  • Dorman® - Automatic Transmission Pressure Sensor Transducer
    Dorman®Automatic Transmission Pressure Sensor Transducer
    0
    # sp118991
    Automatic Transmission Pressure Sensor Transducer by Dorman®. Dorman has all the components needed for a complete repair. Quickly and easily installed, it eliminates the clunking noise that may result when this part fails, while...
    Easy to installDirect replacement for a proper fit
    $30.23 - $60.50
  • Dorman® - Automatic Transmission Wiring Harness Connector
    Dorman®Automatic Transmission Wiring Harness Connector
    0
    # sp233172
    Automatic Transmission Wiring Harness Connector by Dorman®. Dorman’s Automatic Transmission Wiring Harness Connector is engineered for ease and convenience. It comes with everything necessary for a complete installation.
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $26.99
  • Dorman® - Transmission Temperature Sensors
    Dorman®Transmission Temperature Sensors
    0
    # sp243979
    Transmission Temperature Sensors by Dorman®. Prevent costly transmission damage with Dorman’s Auto Trans Temperature Sensor. It is durably built to gauge the transmission fluid temperature, ensuring accurate temperature readings.
    Direct replacement and direct fit sensors available for ease of replacementEngineered from durable materials for long-lasting service
    $11.46
  • ACDelco® - GM Original Equipment™ Automatic Transmission Temperature Sensor
    ACDelco®GM Original Equipment™ Automatic Transmission Temperature Sensor
    0
    # sp11378
    GM Original Equipment™ Automatic Transmission Temperature Sensor 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
    $14.18 - $25.21
  • ACDelco® - GM Original Equipment™ Automatic Transmission Wire Harness
    ACDelco®GM Original Equipment™ Automatic Transmission Wire Harness
    0
    # sp11445
    GM Original Equipment™ Automatic Transmission Wire Harness 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
    $48.31 - $230.74
  • ACDelco® - Genuine GM Parts™ Automatic Transmission Control Solenoid
    ACDelco®Genuine GM Parts™ Automatic Transmission Control Solenoid
    0
    # sp216847
    Genuine GM Parts™ Automatic Transmission Control Solenoid 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
    $33.39 - $986.50
  • ACDelco® - Genuine GM Parts™ Automatic Transmission Control Solenoid Valve Filter Plate
    ACDelco®Genuine GM Parts™ Automatic Transmission Control Solenoid Valve Filter Plate
    0
    # sp216848
    Genuine GM Parts™ Automatic Transmission Control Solenoid Valve Filter Plate 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
    $22.82 - $27.19
  • ACDelco® - Genuine GM Parts™ Automatic Transmission Pressure Control Solenoid
    ACDelco®Genuine GM Parts™ Automatic Transmission Pressure Control Solenoid
    0
    # sp216973
    Genuine GM Parts™ Automatic Transmission Pressure Control Solenoid 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
    $35.87 - $130.21
  • ACDelco® - Genuine GM Parts™ Automatic Transmission Shift Solenoid
    ACDelco®Genuine GM Parts™ Automatic Transmission Shift Solenoid
    0
    # sp249921
    Genuine GM Parts™ Automatic Transmission Shift Solenoid 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
    $20.54 - $43.17
  • ACDelco® - Genuine GM Parts™ Automatic Transmission Speed Sensor Reluctor Ring
    ACDelco®Genuine GM Parts™ Automatic Transmission Speed Sensor Reluctor Ring
    0
    # sp217010
    Genuine GM Parts™ Automatic Transmission Speed Sensor Reluctor 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
    $12.90 - $26.06
  • ACDelco® - Genuine GM Parts™ Automatic Transmission Tow & Haul Switch
    ACDelco®Genuine GM Parts™ Automatic Transmission Tow & Haul Switch
    0
    # sp248661
    Genuine GM Parts™ Automatic Transmission Tow & Haul Switch 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
    $32.09 - $35.12
  • ACDelco® - Genuine GM Parts™ Automatic Transmission Wiring Harness
    ACDelco®Genuine GM Parts™ Automatic Transmission Wiring Harness
    0
    # sp244002
    Genuine GM Parts™ Automatic Transmission Wiring Harness 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
    $31.33 - $491.75
  • ACDelco® - Genuine GM Parts™ Park Neutral Position and Back-Up Light Switch
    ACDelco®Genuine GM Parts™ Park Neutral Position and Back-Up Light Switch
    0
    # sp217100
    Genuine GM Parts™ Park Neutral Position and Back-Up Light Switch 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
    $54.55 - $83.68
  • ACDelco® - Genuine GM Parts™ Transmission Clutch Pedal Position Switch
    ACDelco®Genuine GM Parts™ Transmission Clutch Pedal Position Switch
    0
    # sp249933
    Genuine GM Parts™ Transmission Clutch Pedal Position Switch 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...
    $14.60 - $45.69
  • ACDelco® - Genuine GM Parts™ Transmission Control Module
    ACDelco®Genuine GM Parts™ Transmission Control Module
    0
    # sp217115
    Genuine GM Parts™ Transmission Control Module 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 lifestyle, it...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $133.38 - $660.41
  • ACDelco® - Professional™ Automatic Transmission Control Solenoid
    ACDelco®Professional™ Automatic Transmission Control Solenoid
    0
    # sp11660
    Professional™ Automatic Transmission Control Solenoid 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
    $28.75 - $296.36
  • Mopar® - Automatic Transmission Gear Position Sensor
    Mopar®Automatic Transmission Gear Position Sensor
    0
    # sp205958
    Automatic Transmission Gear Position Sensor 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
    $14.52 - $371.55
  • Mopar® - Automatic Transmission Plug Adapter
    Mopar®Automatic Transmission Plug Adapter
    0
    # sp203820
    Automatic Transmission Plug Adapter 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 manufactured...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $8.82 - $40.36
  • Mopar® - Automatic Transmission Pressure Sensor Transducer
    Mopar®Automatic Transmission Pressure Sensor Transducer
    0
    # sp180913
    Automatic Transmission Pressure Sensor Transducer 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
    $36.05 - $132.70
  • Mopar® - Automatic Transmission Shifter Assembly
    Mopar®Automatic Transmission Shifter Assembly
    0
    # sp203835
    Automatic Transmission Shifter Assembly 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
    $186.18 - $1,183.28
  • Mopar® - Transmission Range Sensor
    Mopar®Transmission Range Sensor
    0
    # sp240133
    Transmission Range Sensor 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 manufactured to meet or...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $2.49 - $320.10
  • Mopar® - Vehicle Speed Sensor Bolt
    Mopar®Vehicle Speed Sensor Bolt
    0
    # sp240134
    Vehicle Speed Sensor Bolt 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 manufactured to meet or...
    High quality at an affordable priceExpertly made from premium materials
    $1.28 - $80.30
  • GENUINE® - Vehicle Speed Sensor
    GENUINE®Vehicle Speed Sensor
    0
    # sp133101
    Vehicle Speed Sensor 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 our website...
    Designed to restore your vehicle’s transmissionGenuine OE replacement parts from the OE manufacturer
    $37.87 - $470.59




All modern automatic transmissions are electronically 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 regulate transmission pressure, shift timing, shift feel, and TCC (Torque Converter Clutch) engagement. The computer activates various solenoids to achieve this, including shift, TCC, and pressure control solenoids.

The engine associated sensors include the TP (Throttle Position) sensor, ECT (Engine Coolant Temperature) sensor, MAP (Manifold Absolute Pressure) sensor, and MAF (Mass Air Flow) sensor. Transmission related sensors include the TFT (Transmission Fluid Temperature) sensor, TSS (Turbine Shaft Speed) sensor, also called an input shaft speed sensor, TR (Transmission Range) switch, sometimes called a neutral safety switch or MLP (Manual Lever Position) switch, VSS (Vehicle Speed Sensor), also called an output shaft speed sensor, and BOO (Brake On/Off) switch. In addition to the above, some transmissions have various pressure switches, a line pressure sensor, and a clutch pressure sensor, and some vehicles have an APP (Accelerator Pedal Position) sensor, an overdrive switch, and buttons or a shift lever that allows manual shifting.

On older vehicles with mechanical throttle linkage, the TP sensor measures throttle opening, which is controlled by the driver’s foot on the gas pedal. The TP sensor is a potentiometer connected to the throttle body shaft that sends a voltage signal to the computer according to the change in resistance that occurs when varying throttle opening. This signal directly affects the computer’s control of line pressure, shift scheduling, and TCC engagement. When the throttle is closed or moderately open, resistance is high and the voltage signal is low, so the computer will keep line pressure low and shifts will be early. Conversely, at WOT (Wide Open Throttle), resistance is low, and the voltage signal is high, so the computer raises line pressure and shifts are delayed and occur at higher rpm. The APP sensor signal serves a similar function on newer vehicles with electronic throttle “drive-by-wire” control.

The ECT sensor is a thermistor that varies the voltage output with engine temperature. When the engine is cold, the sensor’s resistance is high, and as engine temperature rises, the resistance falls. The computer uses the ECT voltage signal to delay shifts and prevent TCC engagement until the engine warms up. The MAP sensor sends a voltage signal to the computer that varies according to engine vacuum, which the computer uses to determine engine load. At idle and light engine load vacuum is high and the voltage signal is low, and at WOT and heavy engine load, vacuum drops and the voltage signal increases. The computer uses the MAP sensor signal to control line pressure, shift timing, and TCC engagement. The MAF sensor also detects engine load but does so by measuring the amount of air entering the engine.

The VSS measures transmission output shaft speed. It can be a permanent magnet or reed-style sensor that signals vehicle speed to the computer. The VSS signal affects shift timing and feel, and if the sensor is defective or there is a problem in the VSS circuit it can result in improper shift timing, abnormally firm shift feel, no upshifts and no TCC engagement. The TSS sensor is the same type of sensor but measures input shaft speed. It is used by the computer for line pressure control during shifts and TCC engagement. A problem with this sensor or its circuit can result in incorrect shift timing, hard shifts, and no cruise control or TCC operation. The TFT sensor functions like the ECT sensor, except instead of engine coolant temperature it is used to signal the transmission fluid temperature to the computer. The computer will delay shifts when the fluid temperature is cold and prevent overdrive or TCC engagement until the fluid reaches a specified temperature.

The BOO switch signals the computer to disengage the TCC when the driver steps on the brake pedal. The BOO switch may or may not be integrated with the stoplight switch. The TR switch signals transmission manual lever position to the computer, which in turn activates the desired transmission gear and prevents the engine from starting in gears other than Park or Neutral. Some vehicles, particularly trucks and SUVs that routinely tow trailers, have an overdrive switch. When the driver activates the switch, it signals the computer to disable overdrive, to prevent overloading the transmission when pulling a heavy load. Some vehicles allow the driver to select transmission gears manually, via a +/- switch located on the column shifter stalk or a floor-mounted shifter that is placed in the manual mode.

The actuators that are commanded by the computer to control transmission operation are electric solenoids. 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. In addition to the above, we have neutral safety switches for older, non-electronic transmissions and clutch switches for manual transmission vehicles, both used to keep the engine from starting with the transmission in forward or reverse gears.

Every vehicle will not necessarily be equipped with all the sensors, switches, and actuators mentioned here, and those detailed above do not represent all the solenoids, sensors, switches, control units and related components we have on offer. No matter what you’re working on, we have the necessary components to restore proper transmission performance and vehicle operation. We offer components that are manufactured according to original equipment specifications, so when repairs are completed you can count on the performance your vehicle was designed to deliver.

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Transmission Solenoids, Sensors, Switches & Control Units Reviews

121 reviews
Replaced my faulty sensor with this one, and the speedometer issues are gone. Perfect fit for my Civic Si.
Posted by David (Phoenix, AZ) / June 30, 20242009 Honda Civic Si
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