Notes: 121254-77681 CASE ASSY, GEAR is original YANMAR product. 121254-77681 CASE ASSY, GEAR5 is commonly used in transmissions/axles/engines 4TNV98-YTBL, 4TNV88-BKMSF, 4TNV88-BKMS, 4TNV88-BDMSF, 4TNV88-BDMS, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849