4 SP1EED TRANSMISSION For 1972 Speedo gear application refer to chart Locate rear axle ratio and corresponding tire size Refer to code chart with proper code letter for part number of driven gear adapter sleeve or key where applicable B B I 1 1 1972 1 NEW PROCESS TRANSFER CASE I 1 1 1 1 1 CODE DRIVEN1 GEAR SLEEVE ASSY CODE ADAPTERS CODE ADAPTERS 1 1 A 38667981 18T 326561 I F 3925671 L 3925669 1 1 B 3866799 I9T 326561 G 3925673 M 3950352 I C 3666917 20T I 326561 H 3950348 N 3950354 I 1 D 4 3866918 21T 326561 J 39503501 E I 3866919 22T 326561 K 3905497 1 1 3 07 3 40 3 54 3 73 4 10 DRIVE DRIVE DRIVE I DRIVE DRIVE TIRE SIZE can can GEAR can can I I I 3964594 13964594 3964594 3964594 3964594 1 1 Driven Adapt Driven Adapt Driven Adapt Driven Adapt Driven Adapt 1 G78 15 IB H D H A N B N D I 8 00 16 5 C J B G A B C N 1 E78 15 C H I A1 B C 1 E L78 15 A H C 1 H 1 D H A C F78 14 C H A N B C 4 E 1 1 8 75 16 5 A H C 1 H A F A A VC 1 4 G78 15 O R B 1 H A A B r D 1 I 1 1 8 16 5 O R C VJ 1 A F A B D 1 G78 14 i A G A 1 B C I 1 I E V 1 L78 15 O B A I H C H D H A C 1 I F7B 140 R D 1 A I B C E I 8 75 16 5 0 R 1 A H C I H A F A1 C 1 1 1 6 50 16P C J I E J D H A N C 1 6 50 16P O R 1 B J Y D J C H A I B 1 6 50 16T B J 1 A G I B G I 1 A C 1 I 6 50 16T O R B J A 1 G B G A C I H78 15 C J A F A B D 1 I H76 15 O R B H A A B D I 7 00 15 B J A G B G A C 1 1 7 00 15 O R A H A G B G A C I j 7 00 16 BIV J 1B H C I1 H D H B I 7 00 16 O R B J B H C H A B I 7 50 16 I A J 1I C J B H C H I A N i I 7 50 16 O R A J C J I B H C 1H A 1 7 00 14 C H I 1 A B C E 1 7 00 14 O R 1 C H 1 A B C 1 e E 8 00 19 5 A 1 H B H A F 9 19 5 0 R 1 B J A H B H V A F I 9 50 16 5 B J I B H C H D H B 1 I 9 5 16 5 0 R B 1 J B H I C H A B I 1 1 10 0 16 5 B J A G E J A B N I 1 10 16 510 R B J A G E J A 1 C 1 7 00 18 A H B H A F I E78 14 E J B L B N C N E 1 N 1 1 1 1 I 1 I 1 I 1 1 1 T i GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TL B REV 5 79 1 1 as 4 aa1 4 asv