Don't know about tractors, but as I recall '73 to '80 half ton Chevy pickups with full time 4wd had 3:08 in front and 3:07 in the rear. That would have made the rear slightly taller than the front.
When I questioned it during the era, I was told it was simply the way the gears had to be designed to keep the front differential from being overly large. The full time transfer case with it's own differential compensated for it, anyway.
Makes sense, though, that the front diff be slightly taller than the rear for steering control.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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