It is a very clunky sound, mainly when I go over bumps but if it is cold out (below 70F) it happens during normal driving. It sounds like it is the rear driver side but I am not 100%. Sound goes away with the slightest pressure on the breaks I tried it while both accelerating and then coasting, it stops both times and then resumes as soon as I let off of the brakes. Any ideas on what it could be? Thanks in advance.