POWERGLIDE AND TORQUE DRIVE TRANSMISSION 1968 PASSENGER SPEEDOMETER GEAR CHART Cont 4 343 REAR GEAR 4 337 4 329 AXLE TIRE SIZE I SPEEDO GEAR ADAPTER RATIO DRIVE SPEEDO SPEEDO POWER DRIVEN GLIDE POWERGLIDE C nt 3 55 E70 x 14 E78 x 14 3924097 3860346 3 70 E70 x 14 3924097 3860347 3 73 8 25 x 14 8 55 x 14 8 85 x14 8 25 x 15 8 55 X15 G70x15 G78 x 15 3924097 3860345 3 73 E70 x 15 F70 x 14 F70 x15 G70 x14 G78 x 14 3924097 3860346 3 73 E70 x 14 3924097 3860347 4 10 F70 x 14 6261794 3987919 3932220 4 10 8 55 x14 8 85 x14 8 25 x15 8 55 x 15 G70 x 15 G78 x 15 3924097 3850347 4 10 8 25 x 14 G70 x 14 G78 x 14 3924097 3880348 4 56 8 55 x 15 6261794 3987919 3932220 4 56 8 25 x14 8 55 x 14 8 85 x14 G70 x15 G78 x14 G78 x 15 6261794 3987920 3932220 4 56 8 25 x 15 6261794 3987920 3932220 4 56 F70 x 14 G70 x 14 6261794 3987921 3932220 4 88 8 55 x 14 8 85 x 14 8 25 x 15 8 55 x 15 G70 x15 G78 x 15 6261794 3987921 3932220 4 88 8 25 x14 F70 x 14 G70 x 14 G78 x 14 3924097 3860345 3932220 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 11 1 4 3374 337 4 210 REV 4 77