GMPartsGiant.com offers the wholesale prices for genuine 1983 Oldsmobile Custom Cruiser parts. Parts like Automatic Transmission Internal Overdrive 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, STATION WAGON.