Every time I disconnect the battery terminals on this truck, the transmission computer goes into safe mode and it shifts into the gears early at low rpms. The motor actually starts to struggle. It goes thru all the gears to OD and then changes back and forth in and out of OD. I turn OD off but it still goes thru the gears fast in all the other gears aswell and it doesn't sound right. I've been having other issues with transmission sensors on this truck which I've replaced over time, but I'm thinking the computer on this truck might be an issue as it takes a few hundred clicks for the computer to go back to shifting normal again after the terminals are disconnected.