Skip the auto shop - Our mechanics make house calls

Q: What would cause my transmission not to go into 1st gear and not down shift

asked by on

What would cause my transmission not to go into 1st gear and not down shift
My car has an automatic transmission.

Hello. I will help you with your question about the transmission in your Chevrolet S10. There are both electronic and hydraulic shift controls in your vehicle. A likely cause of the failure to shift or downshift is a valve in the valve body (including solenoid actuated valves) has failed or is sticking. It is also possible that a hydraulically actuated piston in the transmission that actuates a clutch pack is leaking or an o-ring on a piston has torn or worn out.

Pressure testing can reveal some of these issues or at least distinguish between a hydraulic problem versus an electrical control problem. Valve body issues can usually be dealt with without removing the transmission from the vehicle. If it turns out that a piston has failed, essentially the transmission has to be removed and rebuilt.

If you’d like to get this fixed, consider YourMechanic, as one of our mobile technicians can come to your location to diagnose your shifting issue and help you fix it accordingly.

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!
  • Home
  • Questions
  • What would cause my transmission not to go into 1st gear and not down shift

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: AC not working

The most common cause for AC not working is a leak. Once the refrigerant pressure gets low enough, the system will not work. The vehicle has pressure sensors that keep the system from starting so that you do not damage...

Q: Tranny sliped now drives normal

Check the transmission fluid level. Proper checking instructions vary vehicle to vehicle but it's usually imprinted on the transmission fluid dipstick. Typical instructions will require you to check it while in Park, hot engine, and on level ground. If it...

Q: Retainer cover/seal on transmission keeps blowing off

Hello. There are several possibilities - the transmission fluid could be overheating due to a cooling issue in either the transmission or the engine itself, the transmission vents and/or breather hose could be obstructed or the transmission fluid level might...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...