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

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!
  • 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: Can I use Primium 91 petrol for Pajero in Kuwait climate?? is there any problem for if Use this instead of Super 95?

Hi there: As a United States based online mechanic service, we're not that aware of the different climate changes in Kuwait. However, in general, when you have extreme heat, keeping your fuel consistent is very important for overall performance and...

Q: Heater blows cold air

Hello. If the A/C won’t blow cold air, this is usually due to: Lack of refrigerant in the A/C system A/C compressor has stopped working Blockage in the A/C system It will first be necessary to...

Q: Why is my car dropping out of gear

I have seen this issue before on vehicles with your same drive train. First I would check the transmission fluid level. Do this by starting the engine, letting it warm up to operating temperature, and with the vehicle in PARK,...

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...
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.