Q: Car won't shift into next gear when driving downhill

asked by on

My truck won't shift into the next gear when I'm going downhill, until I start going uphill. Sometimes I can push the O/D twice and that will work. What's happening?

If the transmission operates normally in all other driving conditions this sounds like a feature in the transmission program to inhibit upshifts to prevent a runaway condition when going downhill in case the driver is towing or a hauling heavy load. You may want to have the fault codes read out of the transmission regardless to ensure there are no other issues such as a faulty shift solenoid or gear monitoring issues, as these will affect the shift characteristics of the transmission. You may want to enlist the help of a mechanic, such as one from YourMechanic, to inspect the transmission and recommend a course of repair if needed.

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
  1. Home
  2. Questions
  3. Car won't shift into next gear when driving downhill

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: Problem with transmission and battery.

The brown junk is your radiator is the result of the dexcool coolant that General Motors uses in their vehicles. If the coolant is not routinely flushed out and replaced periodically it will break down. If air gets into the...

Q: My engine is shaking and check engine light blinking

Hi There, Shaking or vibrating may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below...

Q: i think my gear shift is broken because it is very loose. and car won't start

It's possible the linkage, or cable, is faulty which could explain the no start because if the linkage is not in the proper position the neutral start safety switch might not work. To determine the exact problem, please request a...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...