Are you talking about the links or the bushings in the middle of the sway bar?I know what this is. it took me and my 3 teenagers to find it. this rattle was driving me nuts. its the swap bar bushings links. they where just slightly crushed enough to do exactly what your describing. opened the two from doors and had them them hanging on the doors to get max leverage to rock the vehicle back and forth. me and my other teenage got on either side of the front of the vehicle. took about 5 mins of this. and I found the issue. when the body would roll i heard the noise on the drivers side. and located the the slightly crushed sway bar bushings. the other side was fine. but i replaced both.