This is an aftermarket replacement gear case gearbox for compatible John Deere rear discharge mower deck applications. It is part of the mower deck drive system and transfers power through the deck gearbox so the cutting system can operate properly. Built to match OEM This gearbox is made to match the original part’s fit and function for the listed compatible equipment. Mounting locations, housing layout, and drive alignment are intended to match the factory setup without changing the deck configuration. Installation Installation is a straightforward replacement job for a mechanic familiar with mower deck service. Use standard shop tools, follow the equipment service manual for torque and lubricant requirements, and inspect related seals, hardware, and driveline parts while the gearbox is removed. .product-description-v2 { font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, sans-serif; color: #1d1d1d; line-height: 1.55; max-width: 720px; } .product-description-v2 > div { margin-bottom: 18px; } .product-description-v2 h3 { font-size: 16px; font-weight: 700; color: #1d1d1d; margin: 0 0 8px; } .product-description-v2 p { margin: 0; font-size: 15px; } @media (max-width: 768px) { .product-description-v2 { font-size: 15px; } }