My tranny in my 02, 1500, 4x4, 5.9 would start in 3rd and never shift down. I took it to a tranny shop, they had it for a day and a half , scanned and got several codes. They said they had no clue of the problem. They could do a $2,000 tranny job and that may fix the problem.

I unhooked the battery yesterday @ noon. This morning I hooked the battery up and drove my truck with the transmission working perfectly.

I think it is ok. I may have more problems but I'm thinking that a lot of us may be paying for tranny rebuilds and new trannies when there is not a serious problem at all. Just a computer trying to save a truck from damage.

Glad to hear it worked

sounds to me like it went into fail safe its just a matter of time before it does it again. Did you happen to get the codes before they erased all that important data.