Dodge GM NV4500 5th Gear Counter Shaft Kit (Slider, Keys & Springs) 5.61 Ratio Gear has 51 Teeth and is for the 5.61 high ratio. Also included is the 5th gear slider and keys and springs. Please note the NV4500 comes with 2 different 5th gears so check your ratio to make sure you ordering the correct gear. See our other listings for 6.34 high ratio 5th gear kit.