Agreed, Mark. The once substantial efficiency differential between manual automotive transmissions and automatic transmissions of similar era are now vanishingly small.
Eventually, I expect automobiles, heavy trucks, farm tractors, etc., will have electronic transmissions.
GM developed a motor scraper (pan) with an electrical (not electronic) transmission in the 1960s but it was not marketed. Rather than front and rear engines as other self loading motor scrapers used at the time, The prototype had a single Detroit diesel 6V (8V?) 71 in the front driving a generator or alternator (can't remember) and electric motors were used on each wheel. The electrical transmission was similar to that used in railroad locomotives at the time. The electrical system was developed by Delco Products in Dayton, OH. The Euclid division developed the rest of the scraper.
The design was successful but it was not marketed due to changing economic conditions.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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