Abstract: A steering axle suspension system for connecting a frame to a front steering axle in a truck or other heavy vehicle has a substantially non-flexible beam having a front end, a central portion, and a rear end. The central portion of the beam is mounted to the front steering axle and a mounting bracket is mounted on the front end of the beam. The mounting bracket has a bushing located therein with a trunnion shaft extending therethrough. A shaft engagement housing is attached to the frame and non-rotatably engages the trunnion shaft such that the beam can pivot with respect to the frame at the front end. An air spring is sandwiched between the beam and the frame. The air spring is capable of transferring weight from the frame to the axle and the air in the air spring is adjusted by an automatic leveling valve capable of interrelating the amount of air in the air spring to the distance between the frame and the beam.