Suspension

Semi-elliptic, leaf-type rear springs (5560) are used for the rear axle suspension. The forward end of each rear spring is attached to a bracket on the frame (5005). The rear end of each rear spring is shackled to a rear spring shackle bracket (5775) on the frame.

Optional auxiliary rear springs are mounted on top of the main rear spring with free ends. These provide load carrying capacity and stability. Auxiliary springs are standard on all F-350 and all F-Super Duty vehicles (except F-Super Duty Motorhome Chassis).