A method of forming a Salisbury axle that includes: forming an assembly having a housing that is made of nodular iron, the housing having an opening and a pair of apertures; removing a pair of caps from the housing to expose a pair of journals; installing a differential through the opening to the journals; replacing the caps to the journals; forming a pair of axle tubes from a high strength steel, each of the axle tubes having a circular proximal end, a circular distal end and a mount portion between the proximal and distal ends, the proximal ends of the axle tubes being larger in diameter than the apertures, the mount portion having a top wall and a pair of opposite side walls that are oriented generally perpendicular to the top wall; and inserting the proximal ends of the axle tubes into the apertures. A Salisbury axle is also provided.