Just purchased a 2006 F-250 four door psd, 8inch lift and 38.5's. truck looks brand new and rides good for what it is. The only problem im having is that when i hit a bump in the road, it starts shaking really bad and throws the steering wheel to bouncing back and forth. I have to slow down bout 5-10 mph to get it to settle down. Tires are balanced. Any Ideas or tips on where to start looking would be greatly appreciated!!