Our coach weight on rear axle is 9360 pounds. The axle weight rating is 9450. According to this discussion, the coach should not be pounding as much as a lighter weighted E450. Our coach pounds a lot and is the reason I am thinking about new shocks. I have never ridden in another e450 motorhome, shorter or longer. I do not believe that the pounding could be more than the pounding in our motorhome.