Ok i feel like a total idiot... I decided to try and see what the problem was, so as I was driving I leaned out the window to look at the wheel, and lo and behold it was just wobbling freely. I park, get out, and of course the lug nuts are on so loose I can move them with my fingers. I tighten that biatch up and no more chunk. And I just know if I had taken it somewhere they would have told me my axle was bent or something and charge me beauqeaux bucks.