SPEEDOMETER GEAR CHARTS 1968 1970 3 SPEED MANUAL TRANSMISSION DRIVEN GEAR V DRIVEN DRIVEN PART GEAR COLOR PART GEAR COLOR N0 TEETH CODE N0 TEETH CODE 1359273 39 Brown 3987919 19 Natural I 3708143 24 Yellow 3708699 22 Green 3860345 22 Green 3860346 Z3 I 3845071 20 3860347 24 Yellow 3860033 21 3860348 25 Orange 3860329 20 3987920 20 Blue I 3987918 18 Brown I I I I I 1968 CORVETTE SPEEDOMETER GEAR CHART I NOTE Ta order Speedomsrer Gears ar Parts Transmission Type Rear Axle Ratio and Tire Sixe must ba I known I 4 343 4 337 I REAR GEAR GEAR 4 329 AXLE TIRE SIZE SPEEDO SPEEDO ADAPTER RATIO DRIVE DRIVEN SFEEDO 2 73 8 15 x 15 8 45 x I5 I G70 15 3905494 3987918 I 3 07 815x15 8 45x15 I G70 15 6261794 3987918 3 07 F70 x 15 6261794 39879l9 3 08 8 15 x 15 8 45x I5 G70 x 15 6261794 3987918 1 3 08 F70 x 15 6261794 3987919 3 31 8 45 x 15 6261794 3987919 3 31 8 15x15 F70x15 I G70 x 15 6261794 3987920 3 36 8 15x15 F70x15 I G70 15 6261794 3987920 3 55 8 15x15 8 45x15 I G70x 15 6251794 I 3 55 F70 x 15 3860345 I 3 70 8 15x15 F70x15 I G70 x 15 3860345 3 70 8 45 x 15 6261794 3 73 8 15 x 15 8 45 x15 G70 x 15 3850345 I 3 73 F70 x 15 3860348 4 I0 8 15 x 15 8 45 x I5 G70 x 15 3860347 4 56 8 45 x 15 3860345 3890575 4 56 8 15 x15 G70 x15 3860346 3890575 4 89 8 15 x 15 8 45 x 15 G70 x I5 3860347 3890575 I I I I GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 14 I REV 5 80 4 1 C 4 000 GROUP I r