POWERGLIDE AND TORQUE DRIVE TRANSMISSION 1968 PASSENGER SPEEDOMETER GEAR CHART NOTE To order Speedometer Gears or Parts Transmission Type Rear Axle Ratio and Tire Size must be known 4 343 4 337 4 329 REAR GEAR GEAR AXLE TIRE SIZEE A SPEEDO SPEEDO ADAPTER RATIO DRIVE DRIVEN SPEEDO POWERGLIDE 2 73 8 55 x 14 8 15 x 15 8 45X 15 G70X 15 3987918 2 73 8 25 X 14 3987919 3 07 8 55 x 14 8 15 x 15 8 45 x 15 G70 x 15 6261794 3987918 3 07 8 25 x 14 F70 X 15 6261794 3987919 3 08 8 55 x 14 8 15 x 15 8 45 x 15 G70 X 15 6261794 3987918 3 08 8 25 X 14 F70 X 15 6261794 3987919 3 31 8 45 X 15 3987919 3 31 8 25 X 14 8 55 X 14 8 15 X 15 1 70 x 15 G70 X 15 6261794 3987920 3 36 8 25 X 14 8 55 X 14 8 15 X 15 F70 X 15 G70 X 15 6261794 3987920 3 55 8 25 X 14 8 55 X 14 8 15 X 15 8 45 X 15 G70 X 15 6261794 3987921 3 55 F70 X 15 3860345 3 70 8 25 X 14 8 55 X 14 8 15 X 15 F70 X 15 G70 X 15 3860345 3 70 8 45 X 15 6261794 3987921 3 73 8 55 X 14 8 15 X 15 8 45 X 15 G70 X 15 3860345 3 73 8 25 X 14 F70 X 15 3860348 4 1 0 8 55 x14 8 15 X 15 8 45 X 5 G70 X 15 3860347 4 1IO 8 25 X 1 11 3860348 4 111 F70 X 15 3860348 4 56 8 55 X 14 8 45 X 15 3860345 3890575 4 56 8 25 X 14 8 15 X 15 G70 X 15 3860346 3890575 4 56 F70 X 15 3845079 3860033 4 89 8 55 x 14 8 15 X 15 8 45 X 15 G70 X 15 3860347 3890575 4 89 8 25 X 14 3860348 3890575 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 111 REV 4 81 4 49 c 4 000 GROUP