This gear is a transmission component for the host tractor. It transfers torque between shafts inside the gearbox housing, maintaining the correct rotational speed and direction for the selected gear range. A worn or chipped tooth causes gear whine, difficulty engaging a gear, or complete loss of drive in that ratio. The part is machined to the original tooth profile and hardness specification, which ensures it meshes correctly with the mating gear without introducing backlash or noise. On installation, inspect the mating gear for wear and replace the gearbox oil and filter if debris is present.