I been hearing a squeak while driving over small bumps and clunk like metal to metal in the rear of my truck for few weeks now. Its a 95 80 with 120k on it, so far i checked the rear brakes look fine parking brake pads are fine, i took the spare tire out along with the mounting mechanism, I changed all four shock absorbers with OEM and looked at some of the bushings they look somewhat bad but not enough to cause this noise, or can it? Also had a friend jump up and down on rear bumper but could not really hear anythign while the car move up and down while parked. So it seams that the drop of the tire in the pot hole separates something and bangs it back together. I also think the squeak and clunk are two separet sources but anyhow. Can any one please suggest what i need to look at next? thanks in advance