MoparPartsGiant.com offers the wholesale prices for genuine 1984 Dodge Aries parts. Parts like Differential Automatic Transaxle are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.2L, 4 Cyl 2.6L. Transmission: 4-Speed Manual Transmission, 5-Speed Manual Transmission, Automatic Transmission.