Q: Automatic transmission problem

asked by on September 30, 2016

I have a Mitsubishi Space Wagon GDI 2000; This car's engine was replaced with a 2000 Mitsubishi gallant engine and now the automatic transmission keeps reviving up once it is in gear three before engaging and revs up at exactly 50 km/hour then same thing when slowing down too.

My car has an automatic transmission.

Hi, thanks for writing in. This is likely related to the transmission control module which directs the transmission to shift up and down at specific points relative to engine RPMs. If you would like, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What does the Rear Access Open message mean?
The Rear Access Open message will appear on your driver information center (DIC) when the trunk is not properly closed. After you close the trunk, the alert will go away.
Engine light comes on and idles roughly.
Single cylinder misfires are usually caused by ignition components which is where I would start with on this car. Verify the ignition cap and rotor are still in one piece and that the wires are not arcing losing spark. Have...
2005 Nissan Pathfinder won't accelerate
While there can be a few reasons as to why your Nissan Pathfinder is giving these accelerate problems, from my experience the first place I would start investigating is the throttle body. The throttle body in your Pathfinder is electronically...
Car does not accelerate above 2000 RPM
You either have a clogged fuel filter or low fuel pressure. Change the fuel filter and then check the pressure. If the problem continues then you may need to have a diagnosis done on the mass air flow sensor or...
fluids
Such a small amount of coolant may not completely damage the system, but you still do not want it in the power steering system. The power steering system uses a hydraulic fluid and engine coolant may cause the fluid to...
Dash lights stayed on despite several parts were replaced
Since the steering column was opened, and you not only have faults showing in the ESP, ABS, and BAS systems with the indicator lights, but you also have the SRS light on as well, I am inclined to believe that...
Car is dead, no signs of "life" at all.
Since you ran the battery dead several times before you replaced the alternator (https://www.yourmechanic.com/services/alternator-replacement), you caused the battery to get sulfated internally. The lead acid inside a battery will only last for so long. Most batteries will last between 3...
Jeep leaking coolant, not overheating, can't find leak.
Hi there: First off, thanks for your service to our country. Trying to find a coolant leak is one of the more difficult things to do without having the vehicle in motion. However, one thing you might want to do...
My 03 navigator leaked s brownish fluid and now it doesnt move
Hello, thank you for writing in. Due to the fluid found, we need to find and identify the cause of the leak first and foremost. This can be done by tracing it from where the fluid was found, or by...

Related articles

How an Automatic Transmission Works
An An automatic transmission allows a vehicle engine to operate within a narrow speed range, just like a manual transmission does. As the engine achieves higher degrees of torque (torque is the rotational power of the engine), the gears in...
How Long Does a Transmission Speed Sensor Last?
The The transmission speed sensor measures the RPMs of the shaft of the transmission. While the engine is running, but not moving, then the input shaft of the transmission is not moving either. When the input shaft moves, the transmission...
How to Get Mitsubishi Dealership Certified
Mitsubishi dealerships offer automotive technician jobs to mechanics who are ASE certified or have completed the UTI Automotive Technology program.