PREMIUM REPLACEMENT PART — Direct aftermarket replacement for OEM part numbers R124935 and SU52389. Manufactured to meet or exceed original specifications for MFWD gearbox mainshaft/transfer drive shaft.WIDE COMPATIBILITY — Fits John Deere tractor models: 5045D, 5045E, 5055E, 5200, 5210, 5300, 5310, 5400, 5410, 5500, 5510, 5615, 5715 and more 5000 series MFWD 4WD tractors.DURABLE CONSTRUCTION — Forged from high-strength alloy steel with precision machining and heat treatment. Total length 221mm, net weight 2.0kg. Designed for heavy-duty farm use, high torque transmission, and long service life.CRITICAL FUNCTION — Used in the MFWD front axle drop gearbox to transfer engine power to front wheels, enabling 4-wheel drive. Restores proper 4WD operation, eliminates slipping, and ensures reliable power delivery in field conditions.EASY INSTALLATION & WARRANTY — Direct fit, no modifications required. Ready for installation. Comes with 6-month factory warranty against defects. Ideal for farm repairs, maintenance, and tractor restoration projects.