Abstract: A hanger depending downwardly from a side of the chassis supports a torque beam and a lift spring which is mounted between a plate and the torque beam. A cross channel assembly is connected between the hangers of opposite sides of the vehicle. The forward central portion of a wishbone stabilizer assembly is connected to the center of the channel assembly by a special resilient spring and bushing assembly. The wishbone stabilizer assembly has diverging arms. The rearward end of each arm is journalled on a bushing assembly that is mounted in an axle seat assembly. Similarly, the rearward end of the torque beam is journalled on a bushing assembly that is also mounted in the axle seat assembly, and in a longitudinal direction, the stabilizer arm and the torque beam act as a parallelogram to stabilize the axle seat and maintain the pitch of the axle. An air spring is mounted between the axle seat and the chassis and is located directly above the axle.

Abstract: A suspension system including a leaf spring assembly associated with a forward vehicle axle and an air spring suspension assembly associated with a rear axle with an articulated connection between them, such as by way of a shackle. The air spring suspension assembly includes a rocker arm pivotally supported from the chassis. A torque rod and beam assembly is pivotally supported from the chassis and is connected to the axle. An air spring is mounted between the torque rod and beam assembly and a rocker arm. The rocker arm has angled sections allowing accommodation of either wide base or narrow base air spring positions. Other angled sections of the rocker arm position the mounting bushing generally on a line between the air spring and the shackle to center the load on the bushing.