Complete 12 Bolt Modular assembly. Includes choice of housing ends, aluminum end bells, steel tubes, 30 Spline MasterLine axles, 1/2"-20 wheel studs, wheel bearings, spool, Eaton Posi, standard gears and 1350 yoke. Due to the variety of options available, please collect your dimensions, know your suspension and how it will be mounted (4-link, leaf spring, ladder bar, etc.), then call 1-866-508-6394 or contact us to place your order. Installation - Service instructions can be found on Service Bulletin #0054.