Have a friend who stuck his dozer in mud and water, I mean up to the floorboards! I pulled him out with a big winch truck. Dozer tracks would not turn when I tried to pull him, but engine had no load on it in either forward or reverse when in gear. Powershift trans. He has spent all week cleaning the mud out and tracks still will not turn. My question is this dozer supposed to roll with the trans in neutral, because it will not. It doesn't want to move in any gear you put it in, and motor has no load on it in any gear. Blade, hydraulics and engine all work fine. He has owned for 12 years and never had any problems with it. Said he never heard anything unusual before or after he got stuck in mud. Does anyone have any idea what could be wrong? Thanks.