So the weather has been nice enough lately to take the doors off of the JK. I immediately noticed that the seat belts flaped all over the place and the sound became increasing annoying. First thing that came to mind was to use a military blousing strap to hold the belt to the roll bar. Worked like a champ! You can get them here for under 5 bucks http://www.armysurplusworld.com/product.asp?productID=18597 or if you have a military buddy, they are cheaper on base. Quick easy fix, you just have to feed the seat belt back through. I am sure over time the straps will stretch out enough to still hold the seat belt but allow it to feed back on its own.