Gear, trans. mainshaft second gear: 8N, 4 speed trans., 1948-52; NAA; all 4 speed 1955 thru 1964. 56 teeth. B9NN7A381B$123.03 Davis Tractor Parts Ford 8N Dept 24263 Antioch Rd. Andalusia, AL 36421 Phone: 334-222-7214 Fax: 334-222-0025 Email: parts@davistractor.com