2002 Montero Sport 4X2 jerks during and after shifting into 3rd or fourth gear. Particularly bad going uphill. Not so bad during hard acceleration. Have changed fuel filter, plugs, etc. Even changed center bearing, dropped and checked rear differential and drive gears. Still can't id source of jerking. Helpppp!!!

There are a few possible reasons why your 2002 Mitsubishi Montero Sport might not go right after shifting into drive or when at a stop won't take right back off and jerks really hard when it does. Transmission problems: The transmission is responsible for transferring power from the engine to the wheels. If the transmission is faulty, it can cause a variety of problems, including difficulty shifting gears, jerking, and stalling. Clutch problems: The clutch is responsible for engaging and disengaging the transmission from the engine. If the clutch is faulty, it can cause a variety of problems, including difficulty shifting gears, jerking, and stalling. Engine problems: The engine is responsible for providing power to the transmission. If the engine is faulty, it can cause a variety of problems, including difficulty shifting gears, jerking, and stalling. Electrical problems: The electrical system is responsible for powering the various components of the vehicle, including the transmission. If the electrical system is faulty, it can cause a variety of problems, including difficulty shifting gears, jerking, and stalling. If you are experiencing these symptoms, it is important to have your vehicle diagnosed by a qualified mechanic to determine the root cause of the problem. Once the cause of the problem has been identified, the mechanic can recommend the necessary repairs. Here are some tips to help prevent these problems from happening in the future: Have your transmission serviced regularly: The transmission fluid should be changed according to the manufacturer's recommendations. Have your clutch serviced regularly: The clutch should be inspected and adjusted according to the manufacturer's recommendations. Have your engine serviced regularly: The oil and filter should be changed according to the manufacturer's recommendations. Have your electrical system checked regularly: The electrical system should be inspected for any signs of wear or damage. By following these tips, you can help to prevent transmission, clutch, engine, and electrical problems from happening in the future.

On the side of transmission

Range Sensor/Gear Selector/shift lever

Look at the modulator on the side of the transmission. It's probably gone bad.

best advice is dont go 40mph in 5th gear... if you are going up a hill at 40mph in 5th gear i have no doubt that it is jerking, your putting too much stress on the engine. shift up to 4th or 3rd you will be fine. 5th gear is an overdrive gear. 55+mph

the guys who work at advance and autozone are not mechanics, last week they were selling pizza
and the week before that they were delivering newspapers. You need to take your car to a transmission shop sooner rather than later and have its problem diagnosed. Slipping on any transmission is not a good sign and you may well be looking at a rebuild.

Your check engine light is on because the computer picked up a problem with the vehicle. Take it to Autozone and they will scan it for free. They will let you know what is wrong and what parts you may need.

Could be a wheel bearing and/or a rear differential pinion bearing, which usually get worse when under load(going up hill). I would definitely start there.

more than likely you will need a valve body rebuild. you are probably looking around $500+. don't let them try to sell you a transmission. you could search ebay and see if you can find a "rebuilt valve body" but make sure it is for a '00 to '02 SL2

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