E450 handeling problems

No RV rides and steers nearly as well as any car. Your RV is a heavily loaded slab-sided box truck with stiff suspension. You can improve handling and ride with proper air pressure, proper alignment, and even spend big money on suspension and shocks with some real and imagined improvements. Seperators and cupping of concrete interstate highways give you and your RV a beating. Vacuum from passing big rigs pulls on your rig, sidewinds may buffet and alarm you. It's best to stop at rest stops etc every 100 or so miles to relax, stretch, and get blood moving.You will gradually relax, steer and drive
reflexively, and enjoy the ride more. Quieting pots and pans etc. helps enjoyment.