MTD OEM 28 Gearbox Assembly 918-0416B 618-0416B 618-0416 618-0122B 753-0592MTD OEM 28 2 Shear Pin Auger Gearbox Assembly. Fits MTD snow blowers with this part number, including Craftsman Your Craftsman model number. Start with 247 to fit Troy-Bilt, Yard-Man, Yard Machines, White. Made in USA – not a China aftermarket part! If you’d like.