TURBO HYDRAMATIC 4 337 GEAR Transmission Speedometer Driven NOTE For model application see speedometer gear chart NOTE To order speedometer gears and parts transmission type rear axle ratio and tire size must be known SPEEDOMETER GEAR CHART T H 350 DRIVE GEARS Year Part Number Color Number of Teeth 71 2 6260037 Green 18 71 4 6261785 Purple 10 73 4 6261782 Green 9 DRIVEN GEARS 71 2 3987918 Brown 18 71 4 3987919 Natural 19 71 4 3987920 Blue 20 71 4 3987921 Red 21 71 3 3987922 Silver 22 71 2 9774413 Light Green 34 72 1359271 Red 37 72 1362049 Green 42 71 2 9780628 Pink 35 71 2 1359270 White 36 71 2 1359271 Red 37 71 2 1359272 Blue 38 71 2 1359273 Brown 39 71 2 1362048 Black 40 71 2 1362195 Yellow 41 71 2 1362049 Green 42 71 2 1362196 Purple 43 71 2 9780470 Dark Gray 44 71 2 9775187 Light Blue 45 NOTE To order speedometer gears and parts transmission type rear axle ratio and tire size must be known GM PARTS DIVISION GENERAL MOTORS CORPORATION SPR NT 57 4 337 4 337 4 28 REV 4 81