-- Specifications & Features -- Year: 1964. Make: John Deere. Model: 4020. Serial #: 21T 73855. Engine: 6 cylinder. Fuel: Diesel. Meter Reads: 1126. Drive: 2WD. Transmission: 8 speed shuttle shift. 3 Point Hitch: Yes. Rear PTO: yes. -- Seller Statement -- Rear two port auxiliary hydraulics,