Suspension arm

The present invention provides a heavy duty suspension system (10) including a frame (12) and a pair of spaced apart trailing arms (14). The trailing arms each include a forward portion (17) pivotally supported by the frame and extending longitudinally to a rearward portion (18). An axle (26) has opposing end portions (29) pivotally supported respectively on the trailing arms. A V-rod (44) includes first (46) and second (48) spaced apart ends extending to a common third end (50) with the first and second ends preferably pivotally attached to the frame. The third end is preferably pivotally attached to the axle. The V-rod provides lateral stability and defines a pinion angle (56) with the trailing arms. Preferably, the longitudinal length of the V-rod and the length of the trailing arm from the pivotal attachment on the frame to the pivotal attachment on the axle are of equal length to provide a constant pinion angle during movement of the suspension system.