Skip the auto shop - Our mechanics make house calls

Q: Transmission not shifting, overdrive button on dash doesn't work

asked by on

Bought a used transmission and a new torque converter. Old transmission didn't shift up or down, new transmission does the same thing.

My car has 233251 miles.
My car has an automatic transmission.

A: Hello, thanks for writing in. I’d be happy ...

Hello, thanks for writing in. I’d be happy to offer my insight. It sounds like your car has an electrical problem. I would start by checking the signal going to the transmission from the computer. It may not have the proper voltage going to it. It may have a blown fuse or an ignition switch issue. If there is power going to it then it may actually be an issue with the computer itself. If you plan on having this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose this.

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!

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: I cannot shift gears.

The bottom of the gear shifter tube attached to the shifter cable and when you move the shifter it moves the shift cable. On these vehicles they may have a few different issues like the shift tube broke, the bottom...

Q: Loss of power won't go over 35 mph - 1999 Dodge Ram 1500

This may be a sign of low fuel pressure, a failing mass air flow sensor or potentially a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable...

Q: Misfire due to bad ecm

Hi There, The ECM on your Dodge Caravan is located inside the driver's fender on the frame,toward the front bumper. As you know, there are many things that can cause a misfire aside from the ECM. I would suggest removing...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...