TRANSMISSION IDENTIFICATION CONT D INCLUDING A ZL E RATIO TRANSMISSION TO ASLSIEHMBLY 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 MDB 4 SPD A T MW9 4 SPD A T THM7OOR4 TEM2004R m an 9YNM 9YTM 9CUF 9KJF 9KTF QCTF 1990 MDB 4 SPD A T MWB 4 SPD A T THM7OOR4 THM2004R OBAM OBPM OCTF OGUF OKJF DKTF V 1991 GENERALMOTORSSENHCEPARTSOWERAUONS CHEVROLET 17Ml 6 91 4 9 4 000