I have an 06 with 3.5" RE SF , 33x15 on 15x10. When traveling at any speed above about 35mph when I let off the gas my back end wiggles. At slower speeds I can feel the torque release. When I have passengers or weight in the back the wiggle is more servere. I have been under the jeep and visually checked everything and nothing appears to be broke. Any ideas?