How To: Clear The TCM
Here's a short how to from info I found out on clearing the TCM(Transmission Control Module).
This worked for my 1991 Dodge Grand Caravan, and it is supposed to work for most Chrysler TCMs.
Anytime engine work is done on the vehicle, or you have had transmission work done, or engine problems, the TCM sometimes may put the transmission into limp mode.
In limp mode you only have second gear and reverse.
If your car isn't shifting, this maybe the cause, and all you may need to do is clear the TCM.
To clear the TCM:
After the engine is hot, turn the car off.
Then turn the key to the on position 4 times.
This should clear the TCM.