MoparPartsGiant.com offers the wholesale prices for genuine 1998 Dodge Grand Caravan parts. Parts like Coolant Reserve Tank are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.4L, 6 Cyl 3.0L, 6 Cyl 3.3L, 6 Cyl 3.8L. Transmission: 3-Speed Automatic Transmission, 4-Speed Automatic Transmission.