I am working on my grandson's 2010 Avenger, 2.4L with 41TE automatic transmission. A few years ago he had shifting issues and replaced the solenoid pack. When that didn't work, he parked it. He recently moved and had to have the car removed from his old place so I went and got it. It would not shift out of 2nd gear, but it was only a few blocks to my house so I drove it home. When I checked it for codes it had P0750 solenoid A (2/4 shift). I tested the solenoids, all read 1.7 ohms. I checked the wiring harness for a broken wire, all wires had 0 ohms continuity. I ordered a reman TCM/PCM which was programmed to the VIN. When I first put it in and drove it a couple blocks, and up to 40 mph (that was the speed limit of the street) it seemed to work just fine. Just to be certain, I decided to try it again the next day. This time when it tried to shift out of 2nd the rpms went way up as though it were in neutral, then it would slam into 3rd (or 4th?) the check engine light would come on and it would go back into limp mode and not even try to shift out of 2nd. The code change from P0750 Solenoid A to P0760 Solenoid C (O/D). I tested the solenoids and wiring again, still good. contacted the company and they sent me another TCM/PCM. I put that in today. It still will not shift out of 2nd but there are no trouble codes, no check engine light.
While I was waiting for the new TCM I changed the fluid and filter. There was zero debris in the pan, but I am not sure if my grandson replaced the filter when he changed the solenoid pack, I will ask him. I also removed the solenoid pack in case he had gotten dirt in it, sprayed it carb cleaner, and also sprayed carb cleaner in the holes on the mounting pad which lead to the valve body. I let it sit overnight to let any remaining fluid drip out. Since I am working outside, I put the pan back on with a few bolts to keep any dirt or debris from blowing up inside.
I don't know what to do next. Could there be a valve stuck in the valve body? Did I harm it by spraying carb cleaner? My early experience with valve bodies is that they were metal piston-like rods that moved to open and close passages, I don't think there are any materials inside that could have been damaged by the carb cleaner, or am I wrong?