TRANSMISSION IDENTIFICATION CONT D INCLUDING AXLE RATIO TRANSMISSION T0 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 1987 MD9 3 SPD A T THM125C MG1 5 SPD MAN MG3 4 SPD MAN 7PHC 3 43 RATIO RRD 3 61 RATIO 7PKC 3 18 RATIO 7PPC 3 18 RATIO MK7 5 SPD MAN 5ZD 3 45 RATIO 1988 MD9 3 SPD A T THM125C MG1 5 SPD MAN MK7 5 SPD MAN BPPC 3 18 RATIO 8ZR 3 61 RATIO NO CODES AVAILABLE BTRC 3 18 RATIO 1989 MD9 3 SPD A T THM125C MG1 5 SPD MAN 9PPC 3 18 RATIO 9XMX 3 61 RATIO 9TRC 3 18 RATIO 1990 MD9 3 SPD A T THM125C MG1 5 SPD MAN OPPC 3 18 RATIO OXMX OTRC 3 18 RATIO 1991 MD9 3 SPD A T THM125C MG2 5 SPD MAN 1TRC 3 18 RATIO 1XLX 2 61 RATIO ILJC 2 53 RATIO 1LKC 2 84 RATIO t 1992 GENERAL MOTORS SERVICE PARTS OPERATIONS PONTIAC 22J t 4 000 4 6 1 1 92