SPEEDOMIETER GEAR CHARTS 1971 CORVETTE 4 SPD TRANSMISSION SPEEDOMETER GEAR CHART V71 4 337 4 343 4 330 REAR GEAR GIEAR 4 329 KEY AXLE SPEEDO SPEEDO ADAPTER SPEEDO RATIO REAR TIRE SIZE DRIVEN DIRIVE 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 4 11 F70 15 3987921 3978758 6477965 867209 4 56 F70 15 3987920 3978758 6477964 867209 11972 CORVETTE 4 SPD TRANSMISSIOIN SPEEDOMETER GEAR Cll IART 4 337 4 343 4 330 REAFI GEAR GEAR 4 329 KEY AXLEE SPEEDO SPEEDO ADAPTER SPEEDO 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 4 11 F70 15 3987921 3978758 6477965 867209 1973 CORVETTE 4 SPD CODE DRIVEN GEARS TEETH Sl EEVE ASM ADAPTERS KEY ADAP A 3987919 19T 345215 1565211 6476970 B 3987918 18T 345215 C 3987920 2OT 345215 D 3987922 22T 345215 1973 CORVETTE 4 SPD 3 08 3 36 3 56 3 70 4 11 TIRE DRIVE DRIVE DRIVE DRIVE DRIVE SIZE GEAR GEAR GEAR GEAR GEAR 3978758 3978758 3978758 3978758 3978758 GR 70 15 Driven A Driven B Driven A Driven C Driven D 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 I 20 Blue 345215 D 3987922 22 Silver 345215 1974 CORVETTE 4 SPD TIRE 3 08 RATIO 3 36 RATIO 23 56 RATIO 3 70 RATIO 4 11 RATIO SIZE DRIVE GEAR DRIVE GEAR DRIVE GEAR DRIVE GEAR DRIVE GEAR 3978758 3978758 3978758 3978758 3978758 GR70 15 Driven A Driven B Driven A Driven C Driven D Adapter Adapter E Adapter E Adapter E Adapter E WAREHOUSlNG AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION CHEVFIOLET 14 REV 5 81 4 5 c 4 000 GROUP