B22 1980 BUICK TRANSMISSION IDENTIFICATION NOTE Transmission Identification can be Located in One of Three Positions on the Transmission A Identification Plate on Side of Case p B Stamping Number on Governor Cover C Ink Stamped on Bell Housing A SERIES ASSEMBLY CODES M31 3 SPD A T MX2 3 SPD A T M33 3 SPD A T 7TB 7KS 7KC 7KJ 7JE 7KV 7KT y MV9 3iSPD A T M15 3 SPD MAN L M38 3 SPD A T I L L 7BZ 7PW Z6 7KJ 7KH 7BD 7PG B SERIES ASSEMBLY CODES L M33 3 SPD A T I MV4 3 SPD A T I 7KJ 7KD 7LA TW6 7WB 7KN 7WC I M31 3 SPD A T M38 3 SPD A T MV9 3 SPD A T 7TB 7KH 7OT 7BA M40 3 SPD A T 7BB C SERIES ASSEMBLY CODES M33 SPD A T M40 SPD A T MV9 3 SPD A T 7KD 7OB 7BB 7OT E SERIES ASSEMBLY CODES M32 3 SPD A T BJ OL OK OJ OM H SERIES ASSEMBLY CODES M38 3 SPD A T M33 3 SPD A T M20 4 SPD MAN L 7KA I SH X SERIES ASSEMBLY CODES M20 4 SPD MAN M34 3 SPD A T AT 7PZ 7 CV WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION BUICK 41 i 36 I