Skip the auto shop - Our mechanics make house calls

How Long Does a Transmission Speed Sensor Last?

transmission speed sensor

The transmission speed sensor measures the RPMs of the shaft of the transmission. While the engine is running, but not moving, then the input shaft of the transmission is not moving either. When the input shaft moves, the transmission speed sensor reads this motion and delivers this information to the control module. Furthermore, while the input shaft is moving, the vehicle is moving, so the input shaft is rotating at the same RPMs as the engine. The speed of the vehicle depends on the input momentum and the present gear ratio, while the speed of the input shaft is related to the speed of the vehicle.

Over time, the transmission speed sensor can go bad due to wiring issues or just outright failing due to it constantly being used every time you are driving your vehicle. If the sensor is magnetic, it can go bad from iron sticking to the tip of the sensor, which will cause an inaccurate reading. In this case, the sensor may not have to be replaced as the sensor can be cleaned off. Yet, only a mechanic should make that determination because there may be damage to the electrical part of the sensor.

Normally, the transmission speed sensor is diagnosed with a scan tool which is read by a mechanic. If you suspect your transmission speed sensor needs to be replaced because your vehicle seems run at high or low RPMs, contact a professional mechanic so they can inspect your vehicle and read any error codes that come up. Reading the error codes is the most definitive way to determine if your transmission sensor speed is to blame.

Since the transmission speed sensor can go bad and fail over time, it is important to recognize the symptoms before it completely fails so you can have it replaced.

Signs your transmission sensor needs to be replaced include:

  • Erratic RPM readings

  • The needle not moving at all on your RPM gauge

  • Hesitation when you shift gears, either manual or automatic

The sensor is an important part of your transmission and your vehicle running smoothly, so this repair should not be put off. Have a certified mechanic replace the failing transmission speed sensor to eliminate any further problems with your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


Post a question and get free advice from our certified mechanics.


More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...

Related questions

Q: Lots of squealing from engine. I have been told idle pulley bad. Mechanic out of town. Should I drive car? Land Rover LR3

It would be recommended not to drive the vehicle until it is looked at by a certified mechanic. If the [idler pulley])( were to fail, the drive belt would be unable to spin the water pump and cause an overheating...

Q: Clutch not disengaging

You likely need to bleed the pressure out of the hydraulic system. Improper installation could also have caused the problems. I would have a certified mechanic, such as one from YourMechanic, inspect your clutch issue and make the needed repairs...

Q: Stiff gear lever in 01 Jetta with manual transmission

Check the linkage on it. You probably need new bushings on the linkage because they are flat and worn out. If you want to have this verified technician, consider YourMechanic. They will be able to visit your vehicle at your...