Q: Downshifts suddenly automatic locks

asked by on September 01, 2016

I recently had my automatic transmission repaired. It will drive fine for a while and then all of a sudden will downshift and stay like that until my car is turned off and started again. My automatic door locking has stopped working too. Do you know what’s wrong, and how I can fix these problems?

When you encounter the problem try and see if your cruise control works. If the brakes lights stay on, it will cause the cruise to be inoperative and affect the overdrive of the transmission and door locks autolock function. Come to a stop and put the vehicle in park. Check to see if the brake lights are on. If they are, then you may have a bad hydraulic brake assembly causing the problem. It may need overhauled or replaced. If you need help having any of these repairs done, a certified expert from YourMechanic can come to your car’s location to inspect the shifting problem and guide you with the correct repairs.

Was this answer helpful?
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

The power locks are not working on three of the doors

As unlikely as it may be, you could have three failed door motors; it has happened to me in the past. However, fuses, relays, a master switch, or the BCM could also be at fault. Check all fuses/relays and replace...

door locks messed up

It sounds like you may have a lock solenoid failure. A lock solenoid is a magnetic device that pulls the lock mechanism to lock and unlock the door. If you can hear the solenoid clicking in the door, you may...

My 1996 ford tarus started smoking and the making a knocking noise when i press the gas

Engine knocks can mean serious business, and at 220 thousand miles it could be just about anything. It could be that you have internal engine damage. Before you drive the car any more, you should have t checked out to...

Related articles

Symptoms of a Bad or Failing Sliding Motor Door Assembly
Common signs include sliding doors not opening, noise coming from the door, and metal-to-metal grinding when opening and closing the door.
How to Use Autostick
Autostick gives drivers with automatic transmissions the feel of a manual car. It allows the driver to upshift and downshift for extra control.
5 Signs Your Car Isn't Shifting Correctly
Improper shifting is a sign of car transmission problems. The solution might be simple or complex, but get it inspected to avoid expensive repairs.