Skip the auto shop - Our mechanics make house calls

Q: what causes transmission to not shift?

asked by on

transmission shifts smooth and fine but once truck has been running a while will not shift to second. seems like once it heats up it starts doing that. i was having similar problem several months ago but had sensor, neutral safety switch, and manual shift seal, oil and filter changed and worked great for about two months. oil level is good, oil is clean and still looks new. i don't smell any oil, there are no leaks. what could it the causing this problem? I posted this question earlier and received an answer. however i forgot to include all the parts that have been replaced. the parts are included in the 3rd sentence above. Maybe this will help with the diagnostics. thanks!

My car has 159000 miles. My car has an automatic transmission.

A: I would check to see if there are electroni...

I would check to see if there are electronic shift solenoids in your transmission. Basically, the shift speed is controlled electronically through solenoid operated valves. Heat affects these if they are malfunctioning. For example, resistance increases as temperature rises. Also, you could have loose or intermittent connection to the shift solenoids. If you decide to get this fixed, consider YourMechanic, as a certified technician can diagnose your shifting issue firsthand for an accurate repair.

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・Save up to 30%

Get a quote

What others are asking

Q: Car turns over but will not start

It's possible that the vehicle flooded out from running it several times for a short amount of time each time. You could try removing the spark plugs and blowing the cylinders out with air, blow tips of plugs with air,...

Q: The gear does not change and the speedometer is not working as well. what can I do please.

There is the possibility of a speed sensor failing. If the vehicles computer cannot calculate the speed, it will not perform correctly. Consider consulting a mechanic to inspect the gear shifting issue in person in order to get an accurate...

Q: Shifting won't go into gear - 1973 Chevrolet C20

Check fluid level in the transmission. Did you correctly engage the front pump with the torque convertor, and filled the torque convertor with fluid before installing it? Let the truck idle 15 minutes or so, and check for Drive/Reverse after...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control 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...