CORVETTE ENGINE SERIES NUMBER AND SUFFIX CHART Cont 1980 TRANSMISSION IDENTIFICATION CODES MIB 4 SPD MAN ZJ M33 3 SPD A T JC BUICK M 4 3 SPD A T TW CHEV 1981 TRANSMISSION IDENTIFICATION CODE M18 4 SPD MAN MX3 3 SPD A T CC BJD 1982 TRANSMISSION IDENTIFICATION CODE MDB 4 SPD A T YA WAREHDUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CDRPORATION CHEVROLET 14A 16 REV 12 83 A I 7