I agree 4000 was a stripped down 4020 but technically 4000 didn't have a 3020 read end. Granted 4000 had collar shift reverse with no reverse syncronizers such as 4020 had.
3020 planetary didn't have this shaft(R45779) or this carrier(R45842) and differential(ring gear & pinion AR33962) were same as 4020
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Today's Featured Article - Tractor Profile: Oliver 70 Row Crop - by Staff. The Oliver 70 was part of the "Fleetline Series" and was manufacturered from 1937 to 1948. The row-crop configuration could have either dual or single front wheels. The Oliver 70 was also offered in the standard, orchard and industrial configurations. The tractors were sold in Canada. An early advertisement states "Power when you want it - power when you need it - power to help put in crops when field conditions are right and time and help are limited. That's the power you'll find in an Oliv
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