Skip the auto shop - Our mechanics make house calls

Q: I have problems with my transmission

asked by on

I bought a car that was listed as having no reverse. I bought a battery and started the car I shifted into drive and it moved forward. I shifted into reverse and nothing happened. I shifted between drive 1,2 neutral and reverse about 10 to 15 times and reverse came back but now it will not move forward. I have checked the shift linkage and the neutral safety switch/range selector and they seem to be ok. any info would be appreciated.

My car has 96000 miles.
My car has an automatic transmission.

What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle speed sensors and engine speed sensors. Based on this information, the Engine Control Unit (ECU), or the Transmission Control Unit (TCM), executes the appropriate upshifts and downshifts by sending a signal to one of several shift solenoids. These transmission solenoids have spring-loaded plungers inside them, which are wrapped with wire. When this coil of wire receives an electrical charge from the TCM / ECU, it causes these plungers to open, allowing transmission fluid to flow into the valve body and pressurize the desired clutches and bands. When this happens, the transmission changes gears and you continue down the road. The computer controls the transmission solenoid in several ways. If the vehicle is equipped with a dedicated Transmission Control Unit, it can open or close the hydraulic circuit using a direct 12v signal. In some cases, the Engine Control Unit (ECU) can control the solenoid’s plunger by turning the ground circuit on and off. When this is not working properly, this can cause a jerking reaction, a delay in shifting or in some cases may cause the transmission to hesitate in shifting gears. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your transmission.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My serpentine belt & pulley fell off

Hello there, a variety of failures will cause your 2004 Ford Crown Victoria to have a drive belt and pulley fall off. The steering will become difficult when the drive belt comes off the engine as the power steering pump...

Q: Brake failure

Brake pads are replaced when the amount of friction material on the pad falls below a certain minimum depth, generally around 1 to 2 millimeter depth of pad material. When brake pads are replaced, the brake rotors must be resurfaced...

Q: Engine and transmission mounts

The first way is to visually look at them to see if you can see the rubber is damaged, broken or oil soaked from a leak that should be fixed first. If the transmission is an automatic transmission then you...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.