Department
Transmission
The transmission department lists 315 parts from $4 to $711 for vehicles built from 1964-2025. It covers sensors, solenoids, switches, filters, mounts and oil coolers, plus transfer case motors and shifter bushings. Select your year, make and model, then match your transmission type to see the parts that fit.
Part types
Mitsubishi Electric Automatic Transmission Speed Sensor W0133-1888720
Fits 2006 models
Original Equipment Automatic Transmission Solenoid W0133-1709024
Fits 1997–1999 models
Original Equipment Automatic Transmission Speed Sensor W0133-1948773
Fits 2002 models
Parts in this department
Automatic transmission speed sensors are the largest group with 54 listings. You will also find neutral safety switches, transmission filters, oil coolers, overdrive relays and switches, transmission mounts, transfer case motors, automatic transmission solenoids and shifter bushings. Brands include Standard Motor Products, Dorman, AC Delco, Genuine and API. Chevrolet, Ford, Dodge and Honda lead the coverage, with the Ram 2500, Silverado 2500 HD, Silverado 1500 and Civic well represented, along with Volvo and BMW.
Common transmission symptoms
Erratic shifting, a speedometer that stops working or a check engine light can come from a failed speed sensor. Harsh or delayed shifts may point to a faulty solenoid or low fluid. If the engine will not crank in park or neutral, or cranks in gear, check the neutral safety switch right away. A clunk when shifting into gear may mean a worn transmission mount. On four wheel drive vehicles, a transfer case that will not change modes may have a failed motor.
Choosing and servicing
Transmission parts depend on the transmission model, not just the vehicle. The same truck can use different speed sensors, filters and solenoids depending on the gearbox and engine. Check the fitment table for transmission type and drive type, and compare the number on your old part. When you change the filter, replace the pan gasket and refill with the fluid type your owner's manual specifies. Check the level using the method for your transmission, since some have no dipstick.
Transmission questions
What does a transmission speed sensor do?
It tells the transmission computer how fast the input or output shaft is turning. The computer uses that signal to decide when to shift. A failed sensor can cause harsh or erratic shifts, a dead speedometer or a stuck gear, often with a check engine code.
How often should I change my transmission filter?
Follow the service schedule in your owner's manual. Many automatic transmissions call for fluid and filter service at set mileage intervals, and severe use such as towing shortens them. Some newer transmissions have filters that are not normally serviced, so check your schedule.
How do I know if my transfer case motor is bad?
Signs include a 4WD indicator that flashes or will not change, no engagement when you select four wheel drive, or clicking from the motor. Check the fuses, the selector switch and the wiring first, since they can cause similar problems.