Glenn D. 4/1/2010could be a muffler clamp come loose or could be they didn't tighten the shock mounts and the rubbers fell out, get under it and shake things around
barryp 4/3/2010This is unlikely, but it happened on my 97 gtp. I kept hearing a clunk on right front when I hit a bump. It drove me nuts checking out suspension and exhaust. One day I had to swerve to avoid another car and hit a bump hard. When i got to work I was ticked and slammed the door as I got out. I heard that same clunk. I got back in and kept closing the door until I found that the upper right corner of the windshield was unsealed and bouncing. I had the windshield resealed, end of problem. The rear glass may be sealed differently, and this may not be possible on your car. Try pushing up from inside to check. I guess that last hard bump loosened it enough for me to find it. Also, this may be too obvious, but have you checked your trunk for anything loose?