GMPartsGiant.com offers the wholesale prices for genuine 1984 Oldsmobile Custom Cruiser parts. Parts like Automatic Transmission Internal Power Train Parts are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 5.0L, 8 Cyl 5.7L Diesel. Model Code: 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, BROUGHAM LS 4 DOOR, RWD.