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 1989 ME9 4 SPD A T MD9 3 SPD A T THM44OT4 THM125C 9CLH 3 33 RATIO 9CTC 2 84 RATIO 9YBH 3 33 RATIO 9PDC 2 84 RATIO 9HJC 3 43 RATIO 1990 ME9 4 SPD A T MD9 3 SPD A T THM44OT4 THM125C OLMH 3 33 RATIO OPDC 2 84 RATIO OYSH 3 33 RATIO 1991 GENERAL MOTORS SERVICE PARTS OPERATlONS CHEVROLET 17A 4 000 4 6 5 91