Twstones

Okay, I've had my duals on for about 6 months, never had a rattle or drone problem. 2 days ago I developed a rattle at about 1500 RPM. Seemed to be the worst at slower speeds, and pretty much went away after car warmed up to operating temperature. I had the car jacked up to do some other work, so I keep looking around trying to figure out what was going on. Low and behold, it was the rear license plate frame that would vibrate on the bumper cover!! I cut off a strip of foam and stuck it under the bottom edge of the license plate, and bingo, it went away. I know this problem has been driving some of us crazy, so thought it would be worth posting. Just in case you hadn't checked the license plate out. Good luck....