I know this is going to sound a bit vague but here it goes. I was driving down a shitty road with a ton of bumps, doing about 30mph and something must have fell off. All I heard was thump thump thump, I looked in my rear view and saw nothing??? I pulled over, checked the truck, looked around on the side of the road (found nothing). The thump noise sounded kind of like something of a softer compound (my first thought was a bump stop fell off and bounced around under the truck). Now if I hit a small bump I can hear a slight rattle... WTF! So all bump stops are still there, checked exhaust.. all tight and all rubber hanger connectors are still there, all calipers and brake components are all tight and good, shocks are all fine including the 5th shock. This is sooo friggin irritating! I don't even like to drive my truck at all when I have some stupid mystery like this! If any of you guys has a clue of what to check please let me know. THANKS!!!