To remove the rear bumper just remove the 2 mounting bolts above the exhaust finishers and off she pops, (According to the manual.) Problem is one of mine is unscrewed a couple of turns and the captive nut started turning. I've been informed that the captive nut is a brass insert in the bumper. Anyone been here before? I'm trying to unbolt the casting that holds the bumper and lift it off complete. there are three bolts holding it, two lower no problem and one upper, impossible Any Ideas most welcome Pete