i see now. i dont know if the teeth were already like that, or if this caused it to do that, but what it is, is that the gears get off just by the slightest bit and the teeth hit at the top, rather than in the grooves, which causes the loud noise because it rubs and pushes out. thats why it kept pulling the diff apart. so what do i need to do? get a new gear for the driveshaft..?