1980 John Deere 8640 4WD Tractor, 1,000 Hrs Showing, 275 Hp, 10.1L Turbo Charged 6-cyl Diesel Engine, Quad-Range Partial Power Shift Transmission, 16 Forward Gears & 6 Reverse Gears, 3PT, Large 1,000 PTO, 3 Hydr, Block Heater, 20.8-38 Front & Rear Dual Tires, AC/Heat, Radio, SN: 005637R