MoparPartsGiant.com offers the wholesale prices for genuine 2012 Ram 5500 parts. Parts like Hydraulic Control Unit, Brake Tubes And Hoses, Front are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 6.7L Diesel. Transmission: 6-Speed Automatic Transmission, 6-Speed Manual Transmission.