The McCormick 3664109M4 is a genuine OEM transmission shaft designed for various McCormick CX and MC series agricultural tractors. This critical component ensures efficient power transfer within the tractor's drivetrain, maintaining the machinery's operational integrity. Manufactured to McCormick's exacting standards, it offers durability and precise fitment, making it an ideal replacement for worn or damaged shafts. Confirmed applications include McCormick CX105, CX110, CX75, CX80, CX85, CX90, CX95, MC105, MC110, MC115, MC120, MC130, MC135, MC80, MC90, and MC95 models.