Abstract: An apparatus and method for mounting or assembling an axle or axle housing and a chassis of a vehicle, which improves fit-up between a chassis and axle and reduces shear loads exerted against connectors such as bolts or the like connecting the axle and chassis. The chassis and axle are connected and fixed in relation one to the other in the desired position by the connectors. Wedge surfaces are located on the chassis and on the axle in opposing relation at a predetermined angle and define a space therebetween. A tapered block or wedge member is positionable in the space between the wedge surfaces. An adjusting member is adjustable for applying forces against the wedge surfaces to urge the wedge surfaces apart, for reducing at least some of any shear forces acting against the connectors connecting the axle and chassis.