'06 6.0 w/AT at 8500 feet would rev to 950-1050 rpm and no further. Foot mashed and no advance. Had to rock the truck to get moving then it would be fine for that trip. Re-occurred in the AM again with the same outcome. Craig, CO Ford dealers were stumped and my Fond du Lac, WI fu**ers don't ****, therefore I'm asking for input.
