Jonathan,The torque load on a live axle goes from the top link to the lower link. With an A frame this means, from the wheel all the way to the center of the diff. With a five link set up it goes from the top link to the lower link underneath, this is only half the diameter of the axle and so you have more controll in its mouvement. If you have the book from Dennis Ortenburger ( the legend of the Seven )there is a pic. ho explains it all.