Trouble in paradise ..had trouble with my transmission dropped and took a good one from another truck. trouble is, it stays in first gear and won't go pass that...first I thought It was the fluid ..checked out good. Checked the pipes, air supply line checked good. Ended up draining the tran for some fresh fluid, still nothing....Really don't know what the heck is going on..super stuck ! don't want to ruin this one I just had a tran destroyed beyond repair SOS thanks guys.