MoparPartsGiant.com offers the wholesale prices for genuine 2001 Dodge Ram 3500 Regular Cab parts. Parts like Axle, Rear, With Differential Parts are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 10 Cyl 8.0L, 6 Cyl 5.9L Diesel, 8 Cyl 5.9L. Transmission: 4-Speed Automatic Transmission, 5-Speed Manual Transmission, 6-Speed Manual Transmission.