The john deere 4020 is one of john deeres most famous mid sized tractors with over 180000 having been produced and sold during its production years from 1963 1972 originally a 2wd tractor the 4020 came with optional 4wd in later years of its production. The 4020 continues to be the epitome of john deere tractors deere took a great tractor and made it better when they improved upon the 4010 i would be willing to bet that if you polled a group of 4020 owners who use a number of tractors and asked them which they would give up if they had to none of them would choose the 4020. Remember writing review of the john deere 4020 tractor write another of its pros and cons write your review on the purchase price of the john deere 4020 tractor and the costs associated with its use and servicing be as it uses during the harvest and typical field work write about your own experiences with the use or the experience of friends