17581 - Chevy NV4500 Transmission Countershaft 5th Gear 51T

This is a 5th gear set that rides on the counter shaft of the Chevy 5 speed NV4500 transmission. This gear has 51 teeth, a 6.34 low ratio and comes with the slider, keys and springs! You can identify this transmission in a Chevy by the cast "C-16812" or "C-18157". This transmission has an iron case with an aluminum top cover! This transmission usually comes in the 1990-95 Chevy 3/4 ton or 1 ton gas and diesel trucks.