Had this crocking sound at the front when going slightly fast over a hump...but soft when doing slowly. Thought was the support arms and Absorbers, so had both replaced at the fronts....however, the sound still there. Mechanics replaced mountings at the gear box, again the sound still there...what could be the real problem?

 

Could your flex joint in the exhaust system be going bad? Mine just let go last week. Prior to that I did get an odd rattle, groan when going over speed bumps.