TRANSMISSION IDENTIFICATION INCLUDING AXLEEE 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 4 SPD A T I THM440T4 BA 2 84 RATIO BS 3 06 RATIO OB 3 06 RATIO BX 2 84 RATIO BN 3 33 RATIO FRONT AXLE IDENTIFICATION 1 2 84 RATIO E17 OPTION 3 06 RATIO FW2 OPTION 3 33 RATIO OPTION BA BX BS OB BN 1986 ME9 4 SPD A T THM440T4 GBA 2 84 RATIO 6BL 2 73 RATIO I 6BM 2 84 RATIO 6BT 2 97 RATIO T GAC 3 33 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 4 SPD A T THM44OT4 BBKH 2 73 RATIO BBTH 2 97 RATIO BFSH 2 84 RATIO i 19912 GENERAL MOTORS SERVICE PARTS OPERATION BU CK 44C L 892 43 4000