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Nine-speed automatic

 
ZF 8-speed automatic transmission

ZF CEO Says Nine Speeds Are The 'Natural Limit'

For decades, automatic transmissions had three or four speeds, which were deemed sufficient to provide reasonable acceleration and fuel economy. Then came the five speed automatic, which was standard issue on most cars until just a few years back. Then, the race for more gears in the transmission...

November 6, 2012 by 
 
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