I have a 24 foot class C E-350 ford based motorhome. On good roads it rides great. Humps are handled with ease. However, pavement strips feel like 6 inch dropoffs. I just drove from south Florida ...
Have you had your shock absorbers replaced lately or ever? I installed Koni's and the ride quality has improved dramatically. Search on this forum regarding that. Adjust tire pressures also
and air bag pressures. I stopped every few hundred miles and adjusted my air bags until I hit the sweet spot which was 40-45 for my rig. With my 20ft. trailer it goes to 85-90.