1980 CHEVROLET TRANSMISSION IDENTIFICATION C21 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 lnk Stamped on Bell Housing A SERIES ASSEMBLY CODES MI5 i 3 SPD MAN M20 4 SPD MAN MV9 3 SPD A T ZS Z8 ZCC 7CA 7CK M33 3 SPD A T M38 3 SPD A T MV4 SPD A T 7KC 7KJ 7JK 7JJ 7WD KT 7JE 7XN 3 SPD A T 7WL 7XL B SERIES ASSEMBLY CODES MV9 3 SPDAL MBI 3 SPD A T M33 3 SPD A T 7CC 7CK 7WL 7WH 7JE 7KD 7CE 7XL 7XK M38 3 SPD A T MV4 3 SPD A T 7JA 7KH 7TZ 7WC 7JS 7WD 7XY F SERIES ASSEMBLY CODES MI5 3 SPD MAN M20 4 SPD MAN MZI 4 SPD MAN E SF SR FN M33 3 SPD A T MVS 3 SPD A T M38 3 SPD A T 7NlT 7JL 7CK 7KF 7JD 7JJ 7JK 7JL H SERIES ASSEMBLY CODES M20 4 SPD M T M29 3 SPD A T M38 3 SPD A T SH 7PA 7PB 7KA 7PY 7PC l IIB 3 SPD A T PA PC T SERIES ASSEMBLY CODES MYI 4 SPD MAN MD3 3 SPD A T M29 3 SPD A T UH UK JC TW 7CN SIVI SN WK VN X SERIES ASSEMBLY CODES M20 4 SPD MAN M34 3 SPD A T AT 7CV 7PZ AU WAREI IOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION CHEVROLET 10 36