A T T E N T IL O N SOME TRANSAXLES TEANSMISSIONS ARE INTERCHANGEABLE AS ASSEMBLIES ONLY FROM ONE MODEL YEAR TO A LATER MODEL YEAR THEREFORE VERIFY MODEL YEAR ON TRARSAXLES TRANSMISSIONS BEFORE ORDERING COMPONENTS FROM THE FOLLOWING CHARTS EXAMPLE 1984 A ME9 W CODE 4BC USE 1984 CHART 1985 A ME9 W CODE SBC USE 1985 CHART 19845 89 TRANESMISSION IDENTIFICATION DURING THE 1986 MODEL YEAR AND THE START OF 1987 PRODUCTION THE FOLLOWING TRANSMISSIONS WILL HAVE A THREE 3 LETTER CODE AS OPPOSED T0 A TWO 2 LETTER CODE EREVIOUSLY USED THE THIRD LETTER IN EACH CODE WILL IDENTIFY TRANSMISSION TYPE 3RD LETTER TRANS TYPE OPTION A 400 M40 B 2000 MV9 C 1250 MD9 F 200 4R MW9 H 440 T4 ME9 M 700 R4 MD8 Z F 7 ME9 1990 91 TRANSMISSBZION IDENTIFICATION DURING THE 1990 91 MODEL YEAR TRE TRANSMISSION CHARTS WILL CARRY THE OLD DESIGINATION CODES ALONG WITH THE NEW HYDRA MATIC DESIG NATION CODES REGIRNING WITH THE MODEL YEAR 1992 ONLY THE HYDRA MATIC DESIGNATIDN CODES WILL BE USED EXAMPLE HYDRA MATIO 3T40 E j1 r JA u r g 1 NUMBER OF SPEEDS TYPE SERIES MAJOR FEATURE 3 T TRANSVERSE BASED ON E ELECTRONIC CONTROLS 4 L LOMGITUDINAL RELATIVE A ALL WHEEL DRIVE 5 PLUS M MANUAL TOROUE HD HEAVY DUTY V CVT CAPACITY TRANS TYPE 3RD LETTER OLD NEW OPTION A 400 BLBO M40 C 1250 3T4O MD9 F 200 4R MW9 H 440 T4 I 4TGO ME9 M 700 R4 ALSO MD8 S AWD 3T40 A MD9 W 4T60 E M13 Z F 7 ME9 ETM40 MG1 MG2 MU1 MY5 9 91 GENERAL MOTORS SERVICES PARTS OPERAT ONS BUICK 44N 2i 91 4 ss 4 498