Notes: 171008-77510 CASE, GEAR is original YANMAR product. 171008-77510 CASE, GEAR5 is commonly used in transmissions/axles/engines 3TNE78A-EMG, 3TNE78A-KG2, 3TNE78A-MG, 4TNV88-ZSTB1, 4TNV88-ZSTB, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849