We have a 96 F250 that has had a rattle underneath for years. I have searched and searched for it with no luck. I thought it was specific to that truck. Then I picked up an 88 F250 with the same damn rattle. A buddy and I drove around for a day with our heads hanging out the window trying to identify it. Then, a couple of days ago I heard the same rattle under a mid-90’s F350 as it drove past us in town. Has anyone else had this issue? Have you have any luck locating it? This is driving me crazy and now I have to deal with it on two trucks.