Notes: 123900-01810 CASE ASSY, GEAR is original YANMAR product. 123900-01810 CASE ASSY, GEAR5 is commonly used in transmissions/axles/engines 4TNE106-TB, 4TNE106T-GE, 4TNE106T-NS, 4TNE106T-NS, 4TNE106T-GE, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849