5 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 1986 MV9 3 SPD A T MD2 3 SPD A T MD8 4 SPD A T THM2OOC THM18OC THM7OOR4 GHH GCA PR UR GTS GYK GYL GYN GYT MW9 4 SPD A T W OVERDRIVE THM 2004R M75 5 SPD MAN MB4 5 SPD MAN GCH GCZ GCR GCY NO CODES AVAILABLE NO CODES AVAILABLE GHC GCA KC KJ MY1 4 SPD MAN RC 1987 MV9 3 SPD A T MD2 3 SPD A T MD8 4 SPD A T THMZOOC THM18OC THM7OOR4 7CAB 7CUB 7HHB 7HLB UG 7TSM 7YKM 7YLM 7YNM 7YTM MW9 4 SPD A T W OVERDRIVE THM 2004R MB4 5 SPD MAN MY1 4 SPD MAN 7CCF 7CHF 7CRF 7CYF CR UUB 7CZF 7HTF 7HFF 7KCF 7KJF 7HDF 1988 MD8 4 SPD A T MW9 4 SPD A T MV9 3 SPD A T THM7OOR4 THM2004R THM2OOC 8YDM 8YTM 8YKM BYUM 8CHF BCYF BCRF 8CCF NO CODES AVAILABLE 8CZF 8KJF BKTF 8CTF j 1991 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17W 4 000 4 8 6 91