MJ01 027 RPO DEFINITIONS I n LHO ENGINE 3 1L 3 1T V6 MD9 TRANSMISSIONAUTOMATIC 3 SPEED THM125C 3T40 MG2 TFIANSM SS ON MANUAL 5 SPEED MUNC E J J 1992 GENERAL MOTORS SERVICE PARTS OPERAT ONS PONT AC 22J 1 000 GROUP 1 28 I 1 1 921