This is an aftermarket replacement gear box for a compatible John Deere front-mount mower deck drive system. It mounts in the deck gear case position and transfers power through the deck drivetrain so the cutting system can operate as intended. Built to match OEM This replacement gear box is made to match the original gear case form, mounting layout, and function for the intended application. The housing, machined surfaces, and shaft locations are built for proper alignment with the existing deck components. Installation This is intended as a bolt-on replacement using the existing deck mounting points, with no modifications required when installed on the correct application. Use standard shop tools, follow the machine service manual for torque and lubrication requirements, and inspect related belts, pulleys, and hardware while the deck is apart. .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; } }