Skip the auto shop - Our mechanics make house calls

Q: 2006 Mitzubishi Galant suddenly goes into a lower gear while driving 40-50 mph.

asked by on

2006 Mitzubishi Galant suddenly goes into a lower gear while driving 40-50 mph but when I turn the car off then back on, it does fine. It normally happens after car has been sitting for a while and after driving about 3 miles. What could be the problem?

My car has 200000 miles.
My car has an automatic transmission.

Unfortunately the age and the high mileage of your Galant may be playing a heavy hand with what you are currently experiencing. Based on the symptoms provided, the shift to lower gear may be due to low or dirty fluid, a failing shift solenoid, perhaps even a failing torque converter. These types of symptoms generally get worse over time and with 200,000 on your Mitsubishi, it may be possible that what once seemed a small concern may have become a larger one.

From my experience, I would conclude that the transmission is likely on its way out. Without knowing the exact condition of the vehicle and if the transmission was maintained by Mitsubishi standards every 30,000 by replacing the fluid and filter, than the best case scenario would be an electrical issue that can be repaired without dropping the transmission. The worst case scenario would be that the transmission will have to be removed out of the car for repair. When this happens the transmission is usually rebuilt.

Answers to the following questions may lead us to a better answer. How long have them symptoms been going on? is there a check engine light on or any other warning lights associated with the symptoms? After turning the car off and on again, does it drives fine? Or will you eventually have to turn the car off and on again?

The best thing to do now would be to have a qualified technician, such as one form YourMechanic, diagnose your shifting issue for you. As there are so many variables to consider, the technician will be able to check your Mitsubishi’s computer for any transmission codes, as well as check the level and condition of the transmission fluid. During a test drive they will use a scanner to communicate with the vehicle, as well as monitor the transmission for important information.

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
  • Home
  • Questions
  • 2006 Mitzubishi Galant suddenly goes into a lower gear while driving 40-50 mph.

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: Brake pedal going all the way to the floor

From the symptoms described, it leads me to believe that your Mitsubishi is experiencing concerns with the master cylinder. A failing master cylinder can duplicate the problems you are experiencing, such as brake pedal going down to the floor. To...

Q: Take key out car jeeps running sometimes. Then as oil and battery light want go off unless u take it slowly out

It seems as if your ignition switch is malfunctioning. Your ignition switch is the part that you stick your key into. This part is responsible for controlling different circuits based on the position of the key. It seems like the...

Q: Transmission problem?

Hello, It sounds like what you are describing may be related to an false reading from a transmission speed sensor. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.