1986 88 TRANSMISSION IDENTIFICATION D DURING THE 1986 MODEL YEAR AND THIE START OF 1987 PRODUCTION THE FOLLOWING TRANSMISSIONS WILL HAVEE A THREE 3 LETTER CODE AS OPPOSED TO A TWO 2 LETTER CODE PREVIOUSLY USED THE THIRD LETTER IN EACH CODE WILL IDENTIFY TRANSMISSION TYPE 3RD LETTER TRANS TYPE OPTION A ADO M40 B 12OOC MV9 C 1125C MD9 F 200 4R MW9 H 440 T4 ME9 M 700 R4 MD8 Z F 7 ME9 P B 1989 GENERAL MOTORS SERVWCEE PARTS 0PERAT 0Ns 10Lt sM0B LE 32J I REV 4 89 4 45 4 499