TRANSMISSION IDENTIFICATION 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 MD9 3 SPD A T MW9 4 SPD A T W OVRDRIVE M31 3 SPD A T THM125C THM2004R THM25OC CE CT PD PW HE OG OM OZ XH WK XD HS HG OJ OO MV4 4 SPD A T MV9 3 SPD A T M57 4 SPD A T THM350C THM200C THM3254L XC XS WC XA OU OI OR BH BE OE OK XN XX M19 4 SPD MAN M17 4 SPD MAN MY8 4 SPD MAN UB UF UM DR UH DS NA UD UR DN UC UN DM Location of Alpha Engine Service Parts Identificat on DO NOT REMOVE 1 G 3 A R 4 7 9 X E 5 1 0 O 0 O 1 AG1 AMG AU3 A31 A90 BMD B 4 B51 B65 B85 B93 CD2 CO4 C49 C60 C90 C95 DF3 D3C D33 D64 E Z E7D FFL F40 GG1 GW9 G60 G67 G89 JA1 JA4 K05 K15 K99 LV2 MXO NA5 NB1 NK1 NK3 N33 N67 GJW T87 UJ3 U23 U35 VO8 V10 WC3 WG2 YT9 Y56 O1L 6PH 42B 42I 420 42T 409 7PH 11A 90A T SCO 253 PAINT LOWER BODY GM CODE 42 LT GRAY FERN MET 1984 CUTLASS COLOR DUPONT CODE 397 AB154 FISHER CODE WA 8239 FILLERS TO BE ARGENT PRINTED IN USA PART N0 14065987 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17F 3O I EV Ei 88