1978 PONTIAC AXLE IDENTIFICATION CODES Indicates Limited Slip P26 A SERIES ASSEMBLY CODES 2 29 RATIO 2 41 RATIO 2 56 RATIO RING RING RING GEAR GEAR GEAR AH 7 R2 7 RY 7 BH 7 SZ 7 SY 7 AZ 7 RC 7 BZ 7 SC 7 RB 7 AA 7 SB 7 BA 7 AJ 7 BJ 7 2 73 RATIO 2 93 RATIO 3 08 RATIO RING RING RING GEAR GEAR GEAR AX 7 RF 7 RV 7 BX 7 SE 7 SV 7 RX 7 AG 7 SX 7 BG 7 RD 7 SD 7 AB 7 BB 7 3 23 RATIO RING GEAR RU 7 SU 7 AU 7 BU 7 AD 7 BD 7 M B SERIES ASSEMBLY CODES 2 41 RATIO 2 56 RATIO 2 73 RATIO RING RING RING GEAR GEAR GEAR GF 7 KR 8 NC 8 MN 8 MW 8 MS 8 LA 8 KK 8 LC 8 KS 8 MR 8 MV 8 MZ 8 YD 8 875 YE 8 875 KJ 8 YU 8 875 YW 8 875 NR 8 3 08 RATIO 3 23 RATIO RING RING GEAR GEAR MY 8 NG 8 MP 8 LG 8 NF 8 MX 8 YJ 8 875 MO 8 YY 8 875 YK 8 875 YZ 8 875 1987 GENERAL MOTORS SERVICE PARTS OPERATIONS PONTIAC 21 i 44