The John Deere R131427 is a genuine OEM PowerShift™ Transmission First Planetary Ring Gear designed for heavy-duty agricultural applications. This critical component ensures reliable power transfer within the transmission system of various John Deere 8000, 8010, 8020, 8030, 9000, 9020, and 9030 series tractors. Manufactured to John Deere's rigorous standards, it provides durability and precise fitment for optimal transmission performance in models including 8100, 8200, 8300, 8400, 8110, 8210, 8310, 8410, 8120, 8220, 8320, 8420, 8520, 8130, 8230, 8330, 8430, 8530, 9100, 9200, 9300, 9400, 9120, 9220, 9320, 9420, 9520, 9620, 9330, 9430, 9530, and 9630.