TRANSMISSION IDENTIFICATION 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 1983 MD9 3 SPD A T THM125C MK7 5 SPD MAN MY7 5 SPD MAN CA 3 43 RATIO ZBC 3 83 RATIO BJ 3 19 RATIO CB 3 18 RATIO BH 3 83 RATIO PG 3 18 RATIO P3 3 33 RATIO HY 3 18 RATIO M19 4 SPD MAN FB 4 10 RATIO SA 4 10 RATIO FRONT AXLE IDENTIFICATION 3 18 RATIO F75 OPTION 3 19 RATIO F67 OPTION 3 33 RATIO GX3 OPTION OB PG BJ P3 HY 3 43 RATIO FW9 OPTION 4 10 RATIO FW5 OPTION 3 83 RATIO FW7 OPTION CA FB SA ZBC BH 1984 MD9 3 SPD A T THM125C M19 4 SPD MAN MY7 5 SPD MAN CA 3 43 RATIO UB 4 10 RATIO BH GB 3 18 RATIO UJ 3 65 RATIO ZAC HC 3 73 RATIO 4ZC HY 3 18 RATIO 2BC PE 3 43 RATIO 4ZD PG 3 18 RATIO 4ZH PJ 3 33 RATIO 4ZJ 4ZF FRONT AXLE IDENTIFICATION 3 18 RATIO 3 33 RATIO 3 43 RATIO CB HY PJ CA PE PG 3 65 RATIO 3 73 RATIO 4 10 RATIO UJ HC UB 1989 GENERAL MOTORS SERVICE PARTS OPERAT ONS BUICK 44J RLEV 10 89 23