1 SPEEDOMETER GEAR CHARTS 1971 CORVETTE 4 SPD TRANSMISSION SPEEDOMETER GEAR CHART 4 337 4 343 4 330 REAR GEAR GEAR 4 329 KEY 1 AXLE SPEEDO SPEEDO ADAPTER SPEEDO RATIO REAR TIRE SIZE DRIVEN DRIVE SPEEDO ADAPTER 3 08 F70 15 3987919 3978758 3 36 F70 15 3987920 3978758 3 55 F70 15 3987922 3978758 3 70 F70 15 3987922 3978758 1 4 11 F70 15 3987921 3978758 6477965 867209 4 56 F70 15 3987920 3978758 6477964 867209 1 1972 CORVETTE 4 SPD TRANSMISSION SPEEDOMETER GEAR CHART 1 4 337 4 343 4 330 REAR GEAR GEAR 4 329 KEV AXLE SPEEDO SPEEDG ADAPTER SPEEDD RATIO REAR TIRE SIZE DRIVEN DRIVE SPEEDO ADAPTER 3 08 F70 15 3987920 3978758 3 36 F70 15 3987921 3978758 3 55 F70 15 3987922 3978758 3 70 F70 15 3987922 3978758 1 4 11 F70 15 3987921 3978758 6477965 867209 1 1973 CORVETTE 4 SPD 1 nmvsn cans Tama smavs Asivi Aonvnans Kev Amr A 3987919 19T 345215 1565211 6476970 1 B 3987918 18T 345215 1 C 3987920 20T 345215 J D 3987922 ZZT 345215 1973 CORVETTE 4 SPD 1 1 3 08 3 36 3 56 3 70 4 11 TIRE DRIVE DRIVE DRIVE DRIVE DRIVE SIZE GEAR GEAR GEAR GEAR GEAR 1 ssvsvsa asvsvss awavss ciensvss ssvavsa 1 GR 70 15 Driven A Driven B Driven A Driven C Driven D 1 Adapt Adapt E Adapt E Adapt E Adapt E DRIVEN SLEEVE CODE GEAR TEETH COLOR ASM CODE ADAPTER A 3987919 19 Natural 345215 E 1565211 B 3987918 18 Brown 345215 C 3987920 20 Blue 345215 D 3987922 22 Silver 345215 1 1974 CORVETTE 4 SPD TIRE 3 08 RATIO 3 36 RATIO 3 56 RATIO 3 70 RATIO 4 11 RATIO 1 SIZE DRIVE GEAR DRIVE GEAR DRIVE GEAR DRIVE GEAR DRIVE GEAR 1 3978758 3978758 3978758 3978758 3978758 1 GR7D 15 Driven A Driven B Driven A Driven C Driven D 1 Adapter Adapter E Adapter E Adapter E Adapter E I 1 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 14 1 REV 5 80 4 5 C 4 000 GROUP 1 1