Skip the auto shop - Our mechanics make house calls

Q: The first gear in my transmission shifts late

asked by on

As i first go to accelerate my car sounds like a big rig diesel engine and the rpms get to 300rpm before shifting to 2nd moving slowly.

My car has 107000 miles.
My car has an automatic transmission.

This may be related to a couple of different things such as low transmission fluid, a faulty TCM solenoid, or a bad TCM module. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car’s computer activates a transmission solenoid, which directs transmission fluid into the valve body to engage the correct gear. When this is faulty or not working properly, this can cause a delay in gear shifting or in some cases cause the car to not shift at all.

The transmission control module (TCM) helps regulate fuel efficiency and power while storing information about the transmission system in its memory. A faulty transmission control module, may cause the car not to increase its speed even when pressing the gas pedal and may respond poorly when you shift the gear into drive. 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 its function. Other components controlled by the the TCM include 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 car. I would suggest having a professional mechanic, such as one from YourMechanic, come to your location to properly diagnose your transmission.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Hard starting after replacing fuel pump

The fuel pump replacement and the subsequent hard starting might be mere coincidence. A way to find out is to request a hard starting diagnostic during which the responding mechanic will inspect not only the fuel supply system, but also...

Q: not shifting at running temp

This can be caused by quite a few different things, from a bad transmission, to a bad speed sensor. Your Durango will need to be connected to a scanner so that all the relevant data can be observed. What is...

Q: Rattling noise coming from my car - 2006 Chevrolet Cobalt

Hi there. Rattling noises can be caused by very many things. The noise needs to be isolated to determine whether the noise is internal (inside the engine or transmission) or external (an accessory component, e.g., A/C compressor, water pump, alternator,...

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...
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...
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...