Have a 2000 mitsubishi montero and the transmission keeps going out

Make sure you have ALL the wires reconnected. The ECM is a good guess. If you have a Pull a Part salvage yard around you, try to get an ECM. About $40. If not check E-bay. You will not like dealer price.

None of the lights work? PRNDL. Or just the D. None come on replace the transmission safety neutral switch also called the range sensor. If just D the diode for it is burnt. Replace the instrument panel or I would just live with it.

Is it a manual shift? If so you may need more clutch fluid.If automatic make sure you have enough brake fluid so you're able to put car in gear.Also make sure you have enough transmission fluid.As for the both feet on the accelerator....sounds like you need a new fuel line.Also make sure there is no water or sediments in gas tank.Try gas treatment to help with that.If you do end up having a transmission problem replacing it will be costly and you might as well just sell her and get another vehicle.Good Luck!

Hello
Possible motor and transmisson mounts need to be repaced.

Well when you are in cold weather and after a high mileage. The Transmission solenoids fails when its cold and they get stuck for a moment and all i can say is that you warm your car for a while before you leave your house and thats good for the engine too and aslo will keep your car running for a long time. Good luck

I have a 98 Montero Sport and the starter is located on the bottom left side of the engine. Its a very tight spot but I unscrewed a bracket in which 2 transmission lines were running under the starter and it gave me more room to play with. Ensure to disconnect battery before you begin

First thing I'd do is replace the fuel filter. If the car runs fine on level ground or downhill but struggles uphill, it's usually because a clogged filter isn't allowing enough fuel through to satisfy the engine's demand for enough to keep you at speed going uphill. Try that out - it's an inexpensive part and is usually the cause of your symptoms.

This I believe is a SOHC (12 valve) engine. If in fact new valves are required I would purchase rebuilt heads and use yours for cores (each head will cost @ $250) I have done this job on my 1990 montero over a weekend. Just get the right parts, keep it clean, take your time and be patient.
I hope this may have helped,
Tom

You just go to the link I attached I'm sure you will get the solution of your problem
MITSUBISHI MONTERO SPORT SERVICE REPAIR MANUAL 1999 2000 2001 2002 DOWNLOAD

when your vehical throws a code and you replace the defective part, you must clear the code or the ecm will still recognize it as an active code.