The Toro 120-3138 Gear Case Assembly is a high-quality replacement part designed for durability and performance. This gear case assembly is suitable for use with Toro lawn mowers and features the part number 120-3138 for easy identification. Say goodbye to engine troubles as this gear case assembly ensures smooth operation and efficient cutting. Made with superior materials and precision engineering, this gear case assembly guarantees a reliable and long-lasting solution for your lawn maintenance needs. Trust Toro for all your lawn equipment needs and experience exceptional results with the 120-3138 Gear Case Assembly.