POWERGLIDE AND TOROUE DRIVE TRANSMISSION 1973 SPEEDOMETER GEAR CHART NOVA P0wcrgIide A 3987920 2OT ilm 3 08 1 DRIVE GEAR TIRE SIZE 6261794 Driven E78 14 A E70 14 A VEGA REAR MODEL 4 337 4 343 AXLE USAGE GEAR SPEEDO GEAR SPEEDO RATIO DRIVEN DRIVE 2 92 All 3987918 I 5261797 3 36 All 3987921 5261797 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET I1 REV 4 81 4 57 c 4 000 GROUP