This may not be new to some folks but I've been going crazy trying to figure out a strange noise coming from the rear of my new JK 2 door. I've had it about 4 months and until 6 weeks ago it's been quiet and rattle free. Then I started getting a noise when I rode over small sharp imperfections in the road. It sounded like a wiring harness or cable slapping against either sheet metal or the hardtop. At first I thought it was related to the rear seat but It did it whether it was folded or not. Looked in the jack storage area, under the vehicle, even checked that the rear wiper motor was secured. Nothing. I was seriously considering taking it to the dealer and decided to give it one more shot. Going to lunch one day I flipped the keys to a co-worked and squeezed myself in the back seat to have a listen. Sure enough we didn't get very far and it started again. Sound like it was coming from the rear glass or tail gate. I reached across the seat back and pressed against the bottom edge of the glass. Everything went quiet. Before that I would have bet money something was rattling instead of a seal making noise against the tail gate. When I got home I cleaned and waxed the top inner lip of the gate and wiped the seal on the rear glass with a silicon spray. Did the same for the 2 front doors and now it's just as quiet as the day I bought it.