A suspension (14) for coupling a steer axle assembly (12) to a vehicle
frame (10) is provided that provides lateral stability to the steer axle
assembly, increased roll stability for the vehicle and a reduction in
axle wind-up during brakingcall without interfering with vertical
displacement of the axle assembly. The suspension includes leaf springs
(44) disposed on opposite sides of the vehicle, each of which is coupled
to the vehicle frame at first and second ends (64, 66) and to an axle
beam (28) intermediate the first and second ends. The suspension also
includes first and second arms (50, 150), each of which is pivotally
coupled to the axle beam at a first end (70, 170) and to the vehicle
frame at a second end (68, 168) proximate one of the ends of a
corresponding leaf spring. The suspension may further include a torsion
bar (52) extending between and coupled to the first and second arms.