There's no difference in the 4000 VS 4020 wide frt axle or brake components listed in parts catalog nor do I remember these differences when I sold them when they were new. I agree that the 4000 had no reverse gear synchronizers and had lighter diff & axle components than a 4020 and weighed less than a 4020
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Today's Featured Article - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
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