Description:Cat drive train components must endure incredible torque, high impact loads, and frequent direction and gear changes. Cat designs and manufactures its transmissions and final drive components with these demands in mind. The result is a drive train that lasts longer and works harder over the life of the machine. Sensor rotor is designed to engage the ring gear to work with the differential to transmit power and compensate for difference in speeds between wheels on either side of machine and provide for positive traction.Attributes:• Hardened steel reduces spline wear.• (125) tooth external spline provides exact OEM fit.• Mounting hole diameter 11 mm (0.433 in), 8 placesApplication:Consult your owner's manual or contact your local Cat Dealer for more information.