A suspension and steering subassembly for a heavy truck is provided
including a subframe. The subframe includes first and second side members
extending substantially in the direction of vehicle travel and first and
second cross members extending substantially perpendicular to the
direction of vehicle travel. The first and second cross members are
integral with the first and second side members such that the subframe is
a unitary member. The first and second side members and the first and
second cross members are further configured to receive first and second
lower suspension control arms, first and second upper suspension control
arms, and a portion of the steering linkage for the vehicle. The subframe
may further be configured to receive a steering gear and one or more
strut rods to provide fore/aft support to the subframe.