11. While making changes to the suspension, we ran into a problem with the factory Kinetic Dynamic Suspension System (KDSS). This suspension system is a patented product of Tenneco (parent company of Rancho Suspension) and is designed to control fore-and-aft sway-bar movement dependent on the vehicle dynamics, such that it stiffens up the suspension when on road at speed and allows it to droop and flex when off road. When modifying the suspension on the Land Cruiser, it is important to back off the set screws in the KDSS master control to allow the hydraulic suspension fluid to flow freely. Once complete and returned to the ground, simply retighten these set screws.