250 350 375 400 TURBO HYDRAMATIC 1971 SPEEDOMETER GEAR CHART T H 350 DRIVE GEARS PART NUMBER COLOR NUMBER OF TEETH DRIVE GEARS 6260037 Green 18 6261785 Purple 10 DRIVEN GEARS 1359273 Brown 39 1362196 Purple 43 3987919 Natural 19 3987920 Blue 20 3987921 Red 21 3987922 Silver 22 9780628 Pink 35 NOTE T0 order speedometer gears and parts transmission type rear axle ratio and tire size must be known 1971 T H 350 exc Camaro REAR 4 337 4 343 4 329 AXLE REAR TIRE SIZE GEAR SPEEDO GEAR SPEEDO ADAPTER RATIO DRIVEN DRIVE ASSY 2 563 E70 14 E78 14 F78 14 G78 14 3987920 6261785 2 733 F78 14 G78 14 F78 15 3987921 6261785 2 733 E78 14 3987922 6261785 2 733 G70 15 G78 15 H78 15 3987920 6261785 2 733 L78 15 3987919 6261785 V 3 071 E70 14 3987920 6261785 3950352 3 083 G78 14 F78 15 G78 15 3987919 6261785 3950352 3 083 E78 14 F78 14 3987920 6261785 3950352 3 083 H78 15 L78 15 3987922 6261785 3 308 E70 14 E78 14 3987922 6261785 3950352 3 308 F78 14 678 14 3987921 6261785 3950352 3 308 G70 15 G78 15 3987920 6261785 3950352 3 364 E70 14 E78 14 3987922 6261785 3950352 3 417 G78 14 F78 15 G78 15 3987921 6261785 3950352 3 417 H78 15 L78 15 3987920 6261785 3950352 1971 T H 350 CAMARO REAR 4 337 4 343 4 329 4 330 AXLE REAR TIRE SIZE GEAR SPEEDO GEAR SPEEDO ADAPTER KEY SPEEDO RATIO DRIVEN DRIVE ASSY ADAPTER 2 733 E78 14 3987922 6261785 2 733 F70 14 F78 14 3987921 6261785 3 083 F70 14 3987920 6261785 867209 3 417 E78 14 3987920 6261785 1565202 867209 3 417 F78 14 F70 14 3987922 6261785 867209 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 11 4 000 GROUP 4 34 c REV 4 81