The McCormick 6679137A1 is a genuine OEM transmission housing designed for various McCormick X4 and X5 series agricultural tractors. This critical component protects internal transmission gears and shafts, ensuring proper lubrication and structural integrity within the drivetrain system. Manufactured to McCormick's exacting standards, it provides a precise fit and reliable performance for models including X4.30, X4.40, X4.50, X5.35, X5.45, X5.55, X5.085, X5.095, X5.105, and X5.115.