Skip the auto shop - Our mechanics make house calls

Q: ABS, Rough shifting

asked by on

I just bought a used truck and I'm going threw my fixes. The ABS light is on and my code reader say left rear wheel sensor. But there are no electrical connections in the rear. Could it possibly be the front left or is there something else to check in the rear. Second issue is my transmission was rebuilt so I've been told by the dealer. It shifts rough out of 1St frequently. And my speedometer and cruise control don't work. Which sensors should I change. I've found 3 so far (transmission) and the two wheel sensors.

My car has 22000 miles.
My car has an automatic transmission.

A: Hello. The only speed sensor located in th...

Hello. The only speed sensor located in the rear of the vehicle will be located in the differential housing. This may be the sensor that requires attention. If our transmission is experiencing shifting problems in first gear, and your speedometer and cruise control are not working, then I would look into the vehicle speed sensors. A fault with the transmission output speed sensor, specifically, can commonly cause the symptoms you are experiencing. I would recommend having a professional technician, such as one from YourMechanic, come to your location to determine if the transmission speed sensor needs to be replaced.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: "Service 4WD" shows on the dash

Hi there. Check the harness wires from the transfer case to the output shaft speed sensor. See if the speed sensor wires are burned and shorted into the harness. This could cause the 4wd to engage when ever and at...

Q: ABS and BRAKE light both on

This issue is very common and is typically related to a worn out ABS Speed Sensor. The function of the speed sensor is to monitor the way the tires rotate, and make sure that the ABS system is triggered if...

Q: Multiple vibrations when driving truck

Hey there, thanks for writing in about your 2015 Chevrolet Silverado 2500. Since your vehicle is still fairly new, most faults on the car should be covered by warranty. You would have to continue to work with GM on this...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...