Skip the auto shop - Our mechanics make house calls

Q: Transmission does not shift properly

asked by on

The car won't change gears properly. It especially acts up when accelerating. It does better if there is no stopping involved so driving in traffic, etc. is near impossible. It only drives at around 20 mph and as soon as it accelerates over that it stops. I have read that there's an issue with Honda and that you have to stop and re-start and then it resets.

My car has 156000 miles.
My car has an automatic transmission.

A: This may be any number of issues as many tr...

This may be any number of issues as many transmissions today have a complex structure and can be very complicated in diagnosing. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module has various sensors such as vehicle speed sensors, wheel speed sensors, throttle position sensors, turbine speed sensor, and transmission fluid temperature sensors that all direct information to it in order for it to perform it’s function. Other components controlled by the TCM are components such as a kick down switch, traction control system, and cruise control module. Any of these may also affect the way the transmission control module performs and controls the transmission and the shifting of your vehicle. I would suggest having a professional from Your Mechanic come to your location to properly diagnose your transmission shifting problem.

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・Save up to 30%

Get a quote

What others are asking

Q: Engine light is on

Hello. Diagnostic Trouble Codes (DTC's) do not necessarily identify faulty parts. For example, the Code you are inquiring about, namely, P0126 could set the Check Engine Light (CEL) simply because the coolant level in your car is too low. If...

Q: wind noise in doors

I'm not sure if the wind noise can be eliminated due to the shape of your 2005 GMC Envoy, but you may be able to reduce it to a more tolerable level. If you have a roof rack, I've heard...

Q: Does wheel need removed to do brake fluid

With most vehicles, it is not necessary to remove the wheels in order to bleed the brakes. Bleeder screws on brake calipers - or wheel cylinders if drum brake-equipped - can usually be accessed without the wheels being removed. Some...

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...
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 Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.