My 1977 cj7 with a 350 and turbo 400 auto trans is lifted 6in spring and 3in body. When you drive it feels like the rearend is floating not stable. I've put new shackles and bushings on the front and rear. Can anyone help? I've been told to put ladder bars or a panhard bar on it. Other lifted jeeps don't seem to have this problem why mine? Thanks for any help that can be offered.