TRANSMISSION IDENTIFICATION CONT D INCLUDING AXLE RATIO TRANSMISSION TO ASSEMBLY CODES Note Transmission identification can be located in one of three positions on the transmission A Identification plate on side of case B Stamping number on governor cover C Ink stamped on bell housing 1990 MD9 3 SPD A T THM125C MT5 5 SPD MAN OKDC 2 84 RATIO OXYX OPNC 2 84 RATIO OKKC 3 18 RATIO 1991 MD9 3 SPD A T THM125C MU1 5 SPD MAN 1PNC 2 84 RATIO 1XYX 3 6 RATIO 1KDC 2 84 RATIO 1 1KKC 3 18 RATIO 1KNC 3 18 RATIO 1991 GENERAL MOTORS SERVICE PARTS OPERATIONS PONTIAC 22N 4 000 44 2 91