Our rear axle wa outof alignemnt and causing driving problems. They had to remove the welds align the whole rear axle ,to the frame and weld in washers. It handles a lot more like a car now. Been living with it since new and had three alignments before, that did not identify the problem. American Coach fixed that problem in just a short time .or ground to bits on the sway bar.
Front rubber sway bar bushings were "rotted" or ground up.
Couldn't fin urethane bushings or would have had them put in, instead of rubber.