This genuine McCormick 3539466M1 gear is a critical transmission component designed for durability and precise fitment. Featuring 27 teeth, an outer diameter of 145 mm, an inner diameter of 45 mm, and a width of 35 mm, this OEM replacement part ensures optimal performance in compatible McCormick CX series and numerous Massey Ferguson tractor models including 3000, 3100, 3600, 4200, 4300, 5400, 6100, 6200, 8100, and 8200 series.