This may be a dumb question. With full-floating axle like that, the wheel bearings are on the outside of axle housing, the axle shafts do not carry any weight, only torque. Could you remove both axle shafts and the differential assembly without affecting the wheels or the brakes? That would reduce the total weight by 100 to 200 pounds (all of it unsprung weight), elliminate the friction of back-driving the pinion gears, and reduce the rotating inertia in that axle.
New sheet metal covers on the end of the hubs and over the pinion mounted hole would still be needed to keep dirt out of the wheel bearings.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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