The John Deere R120390 is a genuine OEM Range Box Input Pinion Shaft designed for various John Deere agricultural tractors. This critical transmission component ensures proper power transfer and shifting within the range gearbox, maintaining optimal machine performance and reliability. It is compatible with a wide range of John Deere models, including 40, 42, 44, 46, 48, 84, 86, 88, 4050, 4250, 4450, 4650, 4850, 4055, 4255, 4455, 4555, 4560, 4755, 4760, 4955, 4960, 8560, 8760, 8960, 8570, 8770, 8870, 8970, 9100, 9200, 9300, 9400, 9120, 9220, 9320, 9420, 9520, 9620, 9330, 9430, 9530, 9630, 9410R, 9460R, 9510R, 9560R, 9470R, 9520R, 9570R, and 9620R series tractors.