You are talking apples and oranges. The truck can be geared with 3.08 and reved out to say 5000rpm in 2nd gear at 40mph. Or geared 4.56 and reved out to 5000rpm in 3rd gear at 40mph. Either way the ground speed will be limited by engine HP. Ground speed will be identical with either gear set. Torque doesn't get you anywhere. You can hold a torque wrench on a bolt at 250lb ft that isn't turning and NO work is being performed. Work is force over distance.HP which is expressed in power is force times distance over time. A 400HP truck will haul the other wise identical truck/trailer combo. Twice as fast as a 200HP unit. If buddy wants to climb hills faster on the freeway. The engine needs more HP at the flywheel.
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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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