A multi-piece rear frame assembly for operably coupling components of a rear suspension to a frame rail of a vehicle frame assembly. The rear frame assembly including a rear shock tower casting welded to the frame rail and having a pair of attachment locations extending laterally outwardly for operably coupling a pair of lateral suspension links thereto, a shock tower extending upwardly for operably coupling a shock/spring assembly thereto. The frame assembly further includes an upper extrusion and a lower extrusion, each welded to the frame rail and having an attachment location for operably coupling a guide link and a forward portion of a lower control arm respectfully thereto. The frame assembly further includes a rear frame member extending downwardly from the frame rail and having an upper and lower attachment location for a rearward portion of the lower control arm and a transaxle cross member respectively thereto.