yeah i love when someone says "i get a little death wobble at 45".
i had death wobble once, on a borrowed set of tires that were in really bad shape. i drove 15 seconds that way and promptly replaced all of my steering.
It is like your axle is fighting to break loose from the frame, or you only have 1 loose lugnut holding the wheel on. Oh and I had it real bad 8.5", 35's, short arms, and no sways. But, I finally shook all the mud from the undercarrige.