MoparPartsGiant.com offers the wholesale prices for genuine 2006 Dodge Ram 3500 parts. Parts like Gearshift Control are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 5.9L Diesel, 8 Cyl 5.7L. Transmission: 4-Speed Automatic Transmission, 5-Speed Automatic Transmission, 6-Speed Manual Transmission.