alright i will definatly take the diffs out! but the weird thing about it all is it went from first being only front wheel drive to being 4 wheel drive then being no drive at all so i just dont know how both diffs could have broke at the same time, and the way the drive shafts tie in to the diffs is weird! the cup from the drive shafts are round, and the diff end is rectangle with the ends being rounded! when the truck was just front wheel drive i checked out the rear drive assemblywhere it met the diff and tightened the set screw to it as much as i could and it gave the truck 4 wheel drive! I just am having a hard time finding out where the problems coming from!