A bushing for heavy-duty vehicle axle/suspension systems and method of making the same. The bushing includes a body formed of an elastomeric material. The body is formed with a central opening that enables a suspension assembly incorporating the bushing to be pivotally connected to the heavy-duty vehicle. The body of the bushing is formed with at least one void that extends partially circumferentially about an inboard or an outboard side of the body and is asymmetrical relative to a vertical plane and a horizontal plane extending through a central pivotal axis extending through the central opening when the bushing is installed in a beam of the suspension assembly.