I just had my 93 trooper rebuilt by AAMCO because of code 33 (force solenoid). The problems happens at idle speed in drive. The check light comes on and goes into limp mode. I have to manaully shift starting from low to D. If I restart the car, it works fine again. I had the solenoid replace 2X and it still happens. I check the alternator, etc... no clue why it still happens. Not sure what it is.