The Rancho RS5000 is the shock that started it all for Rancho. It has been one of the leading selling shocks amongst light truck and SUVs since 1985. The RS5000 is a ten-stage valve shock to increase tuning ability that comes complete with a protective shock boot to protect the 16mm diameter piston rod and oil seal. This shock is available for your Ford Expedition 4wd as well as many other stock and lifted applications alike. This shock is ideal for both on and off-road use and best of all it is at an outstanding price and backed by a Limited Lifetime Warranty.