A powered vehicle suspension assembly includes a mounting bracket configured to be attached to a powered vehicle frame rail, a trailing arm assembly including a substantially rigid trailing arm having a first end pivotably coupled with the mounting bracket and a second end, where the trailing arm assembly is configured to operably couple with a powered vehicle axle arrangement, a spring arrangement supported by the second end of the trailing arm, and a structural reinforcement cross-member configured to extend between and couple with a pair of powered vehicle frame rails.

Disclosed herein is an axle cartridge member for receiving a pair of torsion stub axles. The axle cartridge member includes a pair of laterally opposed bases, with each base defining a cavity therein for receiving an elongated stub housing of the torsion stub axles. The axle cartridge member also includes a pair of axle mounts that each includes a lateral opening extending into the cavity defined in the respective base, and an arch including a crossbar extending at a height above the bases wherein the arch further includes a portion that extends upward from each of the bases at an angle and meets the crossbar that extends generally horizontally between the portions of the arch.