SUSPENSION SYSTEM FOR A VEHICLE

A vehicle (10) includes a trailer assembly (14) supported by a rear chassis system (30). The rear chassis system (30) includes a chassis frame (36) having at least two longitudinal chassis members (48). The rear chassis system (30) includes a rear suspension frame (44) coupled to a back rear axle (40). The rear suspension frame (44) includes a bearing head (60) with a bearing aperture (61). Equalizing beams (66, 68) extend between the front rear axle (38) and the back rear axle (40), with each equalizing beam (66, 68) including a bushing aperture (72). The rear chassis system (30) also includes a plurality of suspension mounts (94). To minimize relative translations experienced by the suspension mounts (94) during operation of the vehicle (10), opposing end sections of a spindle cross member (62), along with the bearing aperture (61) and the bushing aperture (72) are coaxially aligned. Likewise, the opposing spindle end sections (78), the bearing aperture (61), the bushing aperture (72), and a top plate (100) of each suspension mount (94) are coplanar.