Q: Transmission problem?

asked by on

I have an automatic Pontiac G6, 2006. The car was working fine. I went to park and the car would first go in reverse no matter what gear I put it in. Then the car would not move. It would rev. I eventually smelled a burning smell. I never had this problem before. The car has 93000 miles on it. The clutch to change gears felt easier to move, like it was no longer attached to anything. Thank you.

My car has 93000 miles.
My car has an automatic transmission.

Hello, 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 1,000 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!
  1. Home
  2. Questions
  3. Transmission problem?

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: Shake in front end while driving

Hi there, Thanks for taking the time to contact us in regards to your 2008 Pontiac Grand Prix and the shaking issue you're experiencing. Regardless of what type of vehicle you may own, there are typically five mechanical problems that...

Q: What causes black dust on the front wheels?

Hi there: First off, the black dust on your front wheels is brake dust, which is created as the brake pads are applied to the rotor and stop your Subaru. This creates heat and friction which causes them to actually...

Q: Codes p0171/p0300 came up after intake manifold repair, car feels like it’s bogging down/ not getting enough air! Idk what to do ?

The cause behind diagnostic trouble code P0171 is easiest to find by looking at the secondary firing patterns on the bank one cylinders. That will confirm if the too lean condition, that has caused code P0171 to set, affects all...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...