TRANSMISSION IDENTIFICATION CONT D INCLUDING AXLE RATIO TRANSMISSION T0 ASSEMBLY CODES Note Transmission identification can be located in one of three positions on the transmission A Identifioation plate on side of case B Stamping number on governor cover C Ink stamped on bell housing 1989 MD8 4 SPD A T THM7OOR4 M39 5 SPD MAN MB1 5 SPD MAN 9YXM 9YPM 9YZM 9YWM DKB DKC 9YMM 9FKM 9FXM MKG 5 SPD MAN DKA 1990 MD8 4 SPD A T M39 5 SPD MAN THM7OOR4 MB1 5 SPD MAN DKB OFZM OFBM OFTM OFUM DKC MK6 5 SPD MAN DKA 1991 MD8 4 SPD A T M39 5 SPD MAN THMYOOR4 MB1 5 SPD MAN DKB 1FBM 1FTM 1FZM 1FUM DKC MK6 5 SPD MAN DKA 1992 MD8 4 SPD A T M39 5 SPD MAN THM7OOR4 MB1 5 SPD MAN DKB 2FBM 2FTM 2FUM 2FZM DKC MK6 5 SPD MAN DKA 1992 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17F 7 4 000 4 6 1 92