3 SPEED TRANSMISSION 1971 SPEEDOMETER GEAR CHART DRIVE GEARS PART NUMBER COLOR NUMBER OF TEETH M r E DRIVEN GEARS 3987918 Brown 18 39B7919 Natural 19 3987920 Blue 20 3987921 Red 21 NOTE Tv order speedomerer gears and parts transmission typm rsar ax e ratio and tire size must be known REAR AXLE REAR TIRE SIZE 4 337 GEAR 4 343 GEAR 4 319 RATIO SPEEDO DRIVEN SPEEDO DRIVE ADAPTER ASSY 2 733 G78 I5 3987821 5261794 3950350 2 733 L78 15 3987920 6261794 3950350 3 083 E70 14 E78 14 3987920 6261794 3 083 F70 14 F78 14 F7B 15 3987919 6261794 3 083 G70 15 G78 15 H78 15 3987918 6261794 3 308 E78 I4 F78 14 3987921 6261794 3 308 G78 14 3987920 8251794 3 364 E78 14 G78 14 3987921 6261794 1972 SPEEDOMETER GEAR CHART nmvs Germs Part Number of Number Cnlor Teeth 6261794 r e H DRIVEN GEARS 3987918 Brown 18 3987919 Natural 19 3987920 Blue 20 3987921 Red 21 3987922 Solid Sliver 22 NOTE To order speedometer gears parte trensmlsslon type rear ax e ratlo tire sho must be known GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 11 4 337 4 337 me REV 4 77