Every time I go over a bump or dip in the road, there is this awful sound that comes from the right rear of my car. It sounds like a bowling ball is where my spare tire goes and every time a bump is hit, it makes a low, "thud" type sound. I don't know if its my shocks or not. When I push down on my car, I don't hear the noise and the car doesn't bounce as if there was a blown shock. I tried to record the noise but its too low for the mic to pick it up. I don't want to spend money on shocks if that's not the issue. Does anybody know what the problem could be or has anybody had this issue before? Thanks guys.