A 4 SPEED TRANSMISSION 1970 TRUCK SPEEDOMETER GEAR CHART CONT A I 4 2 1 4 24 1 4 330 A REAR I GEAR GEAR 4 329 KEY AXLE REAR TIRE SIZE SPEEDO SPEEDO ADAPTER SPEEDO RATIO A DRIVEN DRIVE SPEEDO ADAPTER 4 I TRANSFER CASE NEW PROCESS A 3 07 G78 x 15 3866798 3964594 1565813 867209 4 3 07 E78 x 1 5 A A 386691 7 64594 1 563967 867209 4 3 07 G78 x 15 0 R H78 x 15 H78 x 15 O R 3866799 3964594 1563967 867209 3 07 6 50 x 16P I 3866917 3964594 A 1583876 867209 I 3 07 6 50 x 16T 6 50 x 16T O R 6 50 x 16P O R 7 00 x 15 10 00 x 16 5 10 x 16 5 AO R V 3866798 64594 1583876 867209 3 07 E78 x 15 O R 3866918 3964594 1583876 867209 3 07 7 50 x 16 O R A 3866798 3964594 1583876 867209 3 73 G78 x 15 G78 x 15 O R 6 50 x 16P A A H78 x 15 H78 x 15 O R 3866799 3964594 3 73 E78 x 15 E78x 15 0 R 3866917 3964694 n 3 73 8 75 x 16 5 7 00 x 15 0 R 6 50 x 16T 6 50 x 16T 0 R 6 50 x 16P O R A 7 00 x 15 8 75 x 16 5 0 R 10 00 x 16 5 A 10 x 16 5 O R 7 50 x 16 0 R 3866798 3964594 A 4 10 8 75 x 16 5 6 50 x 16T 7 00 x 15 A 8 75 x 16 5 O R 10 0 x 16 5 A 10 x 16 5 0 R 3866917 64594 4 10 7 50 x 16 7 50 x 16 0 R 3866798 64594 4 10 7 00 x 16 9 50 x 16 5 7 00 x 16 0 R I 9 5 x 16 5 O R A 3866799 3864594 I 1 4 56 8 75 x 16 5 8 75 x 16 5 0 R 10 0 x 16 5 10 x 16 5 O R 3866919 3864594 4 56 7 50 x 16 7 50 x 16 0 R 3866917 3864594 A I 4 56 7 00 x 16 9 50 x 16 5 7 00 x 16 O R 9 5 x 16 5 O R 3866918 3864594 4 57 8 75 x 16 5 8 75 x 16 5 O R 10 0 x 16 5 I A 10 x 16 5 0 R 3866919 3864594 4 57 7 50 x 16 7 50 x 16 O R 3866917 3864594 I 4 57 7 00 xA 16 9 50 x 16 5 7 00 x 16 0 R A 9 5 x 16 5 0 R 3866918 3864594 1970 TRUCK SPEEDOMETER GEAR CHART CONT A 3 4 337 A 4 343 A REAR I GEAR GEAR 4 329 A AXLE AREAR TIRE SIZE SPEEDO SPEEDO ADAPTER RATIO DRIVEN DRIVE SPEEDO A TRANSFER CASE DANA 3 07 G78 x 15 E78 x 15 O R A 3968032 3964593 3950350 3 07 E78 x 15 A 3968031 39M593 3950348 3 07 8 75 x 16 5 6 50 x 16P 0 R 7 00 x 15 10 0 x 16 5 I 10 x 16 5 0 R 7 50Ax 16 O R A 3968030 64593 50350 A 3 07 7 00 x 15 O R 6 50 x 16P 8 75 x 16 5 0 R 3968031 64593 50350 A 4 3 07 G78 x 16 O R H78 x 15 H78 x 15 0 R 68030 64593 50348 3 72 G78 x 15 A 68030 3964593 50354 3 72 E78 x 15 E78 x 15 O R A 68031 64593 I 3 72 8 75 x 16 6 7 00 x 15 10 0 x 16 5 68031 3964593 25673 A 3 72 7 00 x 15 O FI G78 x 15 0 R 6 50 x 16P H78 x 15 f H78 x 15 O R 8 75 x 16 5 O R 3968030 64593 3 72 6 50 x 16P O R 3968032 64593 3950348 3 72 10 x 16 5 O R 3968030 3964593 25671 4 3 72 7 50 x 16 O R 68031 64593 3950348 1 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TL REV 5 79 4 71 4 337 4 337