Hi there, check the wheel balance first, this is often the cause of this, and just to be safe, have the steering and suspension checked for worn components as well, start here.
mark (mhpautos)
Dec 13, 2009 at 9:38 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.