2001 lxi p605 internal controm module error and p700

just replaced the motor in the car, drove fine for 2 days, then in the morning i had a check engine light and transmission was in limp mode not shifting. parked it until the afternoon, drove it again and check engine light on, but shifted and drove fine. scanned it and got p605 internal control module error and p700 transmission control system error. cleared codes and drove it around, no check engine or pending codes, all normal. this morning, start it up, put it in gear, then try autostick and doesn't work, in limp mode again, no check engine light, but had pending codes p605 and p700, cleared pending codes and it drove normal again. i don't know where to go from here. any help would be appreciated.

replaced the tcm with one out of an 01 stratus with same part number, had dealer relearn the computer and everything is good to go now. No problems at all and the car is doing great. hope this info helps someone some day.