VEHICLE SUSPENSION SYSTEM

A fluid suspension system for a land vehicle is provided with a fluid biasing member with a first fluid port and a second fluid port. The fluid biasing member is adapted to be connected to a chassis and a first axle of a land vehicle spaced apart from a pivotal connection of the first axle to pivot the first axle relative to the chassis upon movement to a first position and a second position. A proportional valve is in fluid cooperation with the first fluid port of the fluid biasing member to permit fluid to flow to the fluid biasing member to bias the fluid biasing member to the first position, and to permit the fluid to flow from the fluid biasing member to the proportional valve, and to the second fluid port of the fluid biasing member to bias the fluid biasing member to the second position.