+3 GEAR-SPEEDOMETER DRIVE-GREEN-22 TOOTH-3.70 REAR-NYLON-61-81 (#54042) 01215 $24.50 In stock Quantity: 1 Add to Bag Product Details 1961-1981 CORVETTE SPEEDOMETER DRIVE GEAR - GREEN 22 TOOTH. FOR 3.70 REAR DIFF. IF YOUR SPEEDOMETER READS TOO, HIGH A DRIVE GEAR WITH ONE MORE TOOTH WILL SLOW IT DOWN APPROXIMATELY 5 MILES PER HOUR. THIS NYLON GEAR MUST BE USED WITH 54051 (STEEL SPEEDOMETER DRIVE GEAR FOR 3.70 TO 4.11 REAR ENDS). SEE BELOW. GM PART NUMBER: 3860345. Save this product for later Favorite