Credit: Ford/ GM/ Green Car Reports
As has been reported here previously, one way of overcoming the abysmal efficiency of the internal combustion engine is more gear ratios. Previously, this had reached a maximum in the ZF 9 speed auto. Now, Ford & GM seem to be inching their way toward the extreme numbers reached in 1960s 50 cc racing motor cycles.
http://www.greencarreports.com/news/1083540_fuel-efficient-9-and-10-speed-auto-transmissions-coming-from-gm-ford / transmission ratio speed gear box gearbox gears speeds efficiency cars SUVs trucks crossovers car SUV truck crossover vehicle vehicles efficiency performance fuel emission pollution regulation development costs economies of scale parts commonality manufacturers software engine characteristics /
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