I have been having a problem with my LMM under heavy load. Its a 2008 deleted with efi live 5 position, I have had the truck since it was brand new so i know what its been through. I will be going up a hill under load and the truck will lug down and all of a sudden go from 1800 to like 2500 rpm, but its not a down shift. After this it will continue to do this down the road you can stand on it and the truck will peg out but still be loosing speed and have absolutely no power. Then the transmission will start to get hot. It will be running perfect on tranny temp before until this happens. Now if i stop on the side of the road and shut it off and let it set for about 5 or 6 min and fire it up and go down the road it will be just fine and dandy all the power in the world and for the rest of the trip no matter how hard I push the damn thing it wont do it again. No lights come on no codes nothing shows up when this happens. What is causing this to happen?