The McCormick 1660905M1 is a genuine OEM ring and pinion assembly designed for various McCormick CX, MC, and MTX series agricultural tractors. This critical drivetrain component ensures proper power transfer and gear ratio, essential for the reliable operation and performance of your machinery. Manufactured to McCormick's stringent specifications, it guarantees durability and precise fitment for models including CX100, CX105, CX110, CX70, CX75, CX80, CX85, CX90, CX95, MC100, MC105, MC115, MC120, MC135, MC80, MC90, MTX110, MTX120, MTX125, MTX135, MTX140, MTX150, MTX155, MTX165, MTX175, MTX185, and MTX200.