Make sure the lower shock bolts are tight. I forget the torque spec, but I know it's 100 ft lbs or better.

 

I havn't fixed this yet I've been noticing it again recently I believe I bought the wheel bearing/hub assembly from either pep boys or advanced auto so if I recall correctly it was a lifetime warranty so I'm going to pull it out and take it up to the store and tell them to give me another one.