The MTD 63804013637 steering knuckle is a genuine OEM replacement part designed for the front axle of select MTD, Cub Cadet, and Troy-Bilt lawn and garden tractors. This critical component facilitates the pivot action of the wheel, enabling accurate steering and maneuverability. It is compatible with both the right and left sides of the front axle, providing a direct fit for models such as the Cub Cadet XT1 LT42 and XT2 LX42. Constructed to MTD's original specifications, this steering knuckle ensures durability and reliable performance for maintaining optimal steering function.