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 - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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