Check the torque on the shocks first. Check all your heat shield bolts as well. I've usually read about frot sway bar bushings being replaced...never rear?
2006 Black WK, Modified OME HD ~3.5'', Bilstein 5100's, 1.5" Wheel Spacers, Black JK Moabs, 285/70/R17 Duratracs, 7W Reverse LED's, tow hooks, 2 Hella 500ff's behind grill, Expanded sheet metal grill, ORT badge, Tail light guards, Firestik 3', Aux. input, Black housing headlights, Stingray roof basket, 2 Hella 500ffs on roof rack, 18% tint.