TRANSMISSION IDENTIFICATION TRANSMISSION TO ASSEMBLY CODES Note Transmission identification can be located in one of three positions on the transmission I A Identification plate on side of case B Stamping number on governor cover C Ink stamped on bell housing 1985 MD9 3 SPD A T THM125C M17 4 SPD MAN M19 4 SPD MAN CA 3 43 RATIO ZNS 4 10 RATIO ZNT 3 65 RATIO CB 3 18 RATIO ZNU 3 32 RATIO PE 3 43 RATIO ZUD 3 65 RATIO P5 3 33 RATIO PG 3 18 RATIO PJ 3 33 RATIO 1986 MD9 3 SPD A T THM125C MD5 5 SPD MAN MK7 5 SPD MAN 6CA 3 43 RATIO NO CODES AVAILABLE NO CODES AVAILABLE 6CB 3 18 RATIO GPH 3 43 RATIO 6PJ 3 33 RATIO 6PK 3 18 RATIO 1987 MD9 3 SPD A T THM125C M19 4 SPD MAN MK7 5 SPD MAN 7PHC 3 43 RATIO SSB 3 65 RATIO 5ZD 3 45 RATIO 7PKC 3 18 RATIO SSF 3 65 RATIO 7PPC 3 18 RATIO 5RN 3 65 RATIO 7CBC 3 18 RATIO 1988 MD9 3 SPD A T THM125C MK7 5 SPD MAN BPKC 3 18 RATIO NO CODES AVAILABLE 8POC 3 18 RATIO 8CBC 3 18 RATIO 1989 MD9 3 SPD THM125C 9CBC 3 18 1989 GENERAL MOTORS SERVICE PARTS OPERATIONS BU CK 44J 24 REV 1089