This is a genuine John Deere AZ101709 gear, essential for critical power transmission within various John Deere agricultural machinery. It is specifically designed for compatibility with John Deere S-Series Combines, including models S660, S670, S680, S690, S760, S770, S780, and S790. Additionally, it fits 8000 and 9000 Series Self-Propelled Forage Harvesters, such as 8100, 8200, 8300, 8400, 8500, 8600, 8700, 8800, 9600, 9700, 9800, and 9900 models. This OEM gear guarantees reliable performance, durability, and maintains the operational efficiency and integrity of your John Deere equipment. It is an interchangeable part with John Deere part number AXE58384.