TRANSMISSION IDENTIFICATION 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 1985 ME9 3 SPD A T THM44OT4 BA 2 84 RATIO BS 3 06 RATIO OB 3 06 RATIO BX 2 84 RATIO BN 3 33 RATIO DY 3 06 RATIO 1986 ME9 4 SPD A T THM44OT4 GBA 2 84 RATIO GBM 2 84 RATIO 6BS 2 84 RATIO 1987 ME9 4 SPD A T THM44OT4 7FKH 2 73 RATIO 7FNH 2 53 RATIO 7FSH 2 84 RATIO 7FTH 2 97 RATIO 1988 ME9 3 SPD A T THM44OT4 V 8BKH 2 73 RATIO 8BTH 2 97 RATIO 1989 ME9 3 SPD A T THM440T4 9BHH 2 84 RATIO 9BTH 2 97 RATIO 9BXH 2 97 RATIO 9WRH 2 84 RATIO 9WUH 2 97 RATIO 1993 GENERAL MOTORS SERVICE PARTS OPEF ATIONS OLDSMOBlLE 32C 283 45 4000