How old are you shocks? I would check ur ground clearance, you might be hitting the road on bumps. I know my header flange hits all the time when I go over a big pothole, even after I putt new shocks and springs on. It constantly drug the ground before a put anything on it, that was one of the main reasons I did it.

It's always a good idea to upgrade your suspension parts to a polyurethane bushing.

If you have any questions just post them up.