My 4runner sqeaks and rocks very rough when going over bumps only when turning at the same time, and it does wiggle a little bit while driving it "what could cause this??"
As far as the rocking and "wiggling" I think it's the tires. Do you have the 265 on 16" rims? I do, and I have the same "wiggling' i think you're talking about and i'm assuming it's just the tires..