This is the 2-Speed Hi/Lo Transmission Conversion Kit for the Axial Yeti. FEATURES First gear is a 2:1 reduction intended for slow crawls High gear option (26T) increases top speed with a 0.93:1 ratio Heat treated hardened steel machined gears 2-speed gear slider with four tooth engagement design for rapid gear shifts on the fly Servo saver with one long and one short servo horn and one each, 23, 24 and 25 tooth splines for different brands of servos INCLUDES 18T, 28T, 26T, 36T and Slider Gear Full set of Transmission Cartridge Bearings Servo Saver System, w/two Servo Horns, and three Spline Adapters Micro and Standard Servo Mounting Brackets All Required Hardware Instruction Sheet REQUIREMENTS 3-channel radio Servo with at least 80oz/in of torque SPECIFICATIONS Lo Gear Ratio: 2:1 Hi Gear Ratio: 1.08:1 Hi Gear Option ratio: 0.93:1