Noises During Shifting problems of the 2005 Dodge Durango

Car stalls at stop light. No reason. Car started shifting into all wheel drive by itself. I could hear it shifting as I opened driver door, and car was not on. Did not know what the noise was. Car sounded like it was grinding the gears when moved into drive. Towed to shop. Transmission guy could not figure out why it changed all by itself. Cargo lamp is one if I open rear hatch. It will only go off if I close the hatch twice. Now airbag light is on, since new battery was replaced.

Problem started with "srv 4 wd" light on dash going on and going off at random while driving. Soon after this initial problem, with vehicle parked and ignition off,4 wheel drive attempts to engage and disengage. The engage/disengage process may occur 2 to 6 times. The sound of this engagement/disengagement is clearly audible. On one occasion the vehicle actually engaged four wheel drive but there was no light on the dash indicating the vehicle was in 4 wheel drive. After driving the vehicle approximately . 5 miles, 4 wheel drive disengaged with a very loud shift noise. At this same time, the "4 lo" display light on the dash began to flicker. It now blinks as if the vehicle is attempting to engage "4 lo" while the vehicle is in motion and the selector set to all wheel drive. I am still able to engage and disengage four wheel drive using the selector switch on the dash manually as is the case with normal 4 wheel drive operation for this vehicle. At this point the vehicle has not switched from awd to 4 wd while in motion at highway speed. I am aware however this is a situation which can occur during vehicle operation while experiencing these 4 wheel drive malfunctions.

As I approached my vehicle and used the remote to open the doors, I heard a noise under the vehicle like gears were shifting on their own without the vehicle even running. I started the vehicle and started driving. When I went into a parking lot and turned left to park, it was like someone was putting on the brakes making it difficult for me to turn and to accelerate--felt like I was in 4wd despite not shifting to 4wd from awd. I nearly hit the car next to mine because I had to accelerate so hard to get into the spot without getting hit from the rear. I turned the car off and let it sit for 1/2 hour and restarted it and drove home. When I let the car sit in the garage, I was in the garage and heard gears shifting on their own while the vehicle was not running. This has already happened 3 times and it is quite scary! if I try to turn left and this happens on the road, I could get into a serious accident.