I really don't know what the problem is. I don't have scan equipment or code reader tool yet ... although tax rebate comes in soon!!

The truck has no CEL and starts fine. Then it shakes at idle. Shake somewhat noticeable when driving. Shake EXTREMELY noticeable when speed is around 45mph and rpm's drop back to 1,100ish ... so I guess it's going into 5th.

Took everything apart again today. All pins were fine and connectors were clean. This was the only thing I could point to.

Rev-X is on its way in the mail as we speak. I hope that may help. Right now the truck is a giant paper weight.

Does a FICM loose it's programing if it sat around disconnected from the vehicle for about 2 weeks in the cold?