MoparPartsGiant.com offers the wholesale prices for genuine 1988 Jeep Grand Wagoneer parts. Parts like Frame, Pad, And Covers Armrest And Center Cushion are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 5.9L. Transmission: 6-Speed Automatic Transmission, Automatic Transmission.