Need to check the caster and camber too, setting the toe is one thing but if one side is riding on the tire edge (camber) or it is too far positive or negative (caster) death wobble can occur. This is especially true with the caster being off when you start lifting it and the oem settings are upset. I had this occur with my 4Runner when I first added a shackle only to my front, once I did the springs and brought it back to specs it settled down.