This aftermarket gearbox shaft and pinion is a replacement internal drive component for compatible John Deere rotary cutter gearboxes. It helps transfer power through the gearbox so the cutter driveline can turn the blade carrier as intended. Built to match OEM The shaft and pinion are made as a faithful replacement for the original gearbox component, with machined surfaces intended to fit the matching gears, bearings, and seals in the existing assembly. It is built for proper alignment and engagement inside the gearbox when installed in the correct application. Installation Installation requires opening the gearbox and removing the worn or damaged shaft and pinion assembly. Use standard shop tools and follow the service procedure for bearing, seal, and gear inspection; no machine modifications are intended when this part is used on the correct compatible equipment. .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; } }