I have had this strange issue for some time now, and havent been able to figure out what is loose.
Basically its a rattling type noise, sounds like a flat metal piece hitting against another metal piece... kind of like if you were to grab a small aluminum sheet and hit it against another. Its coming from the passenger side dash/floor area. It isnt that loud, and doesnt sound like its anything serious, but i can hear it through music that is at a reasonable volume (raising volume does help, but i dont always want to be that loud!).
Its usually noisy going down most streets, but not all the time, my suspension is fairly stiff, so a lot of the vibrations transfer through. I cant generate this noise while standing still and trying to jump on the jeep to make bounce it around. Speed, or engine vibration/rpm doesnt trigger this... just bumps.
Ive opened up the pass side dash a bit, but i dont see or feel anything loose in there. Im guessing it may be coming from the engine compartment, perhaps under the battery or something, but i cant see anything that would be loose enough to cause it.
The mechanic things im crazy, but they did hear it somewhat (the pavement around the garage is too flat to generate it)... The suspension and underside looks and feels solid. I dont mind looking around to try and tighten this down myself to fix... i just dont know where to look.