Details on GM’s new efficient top-end 8-speed automatic
Green Car Congress
AUGUST 21, 2014
EcoTec3 V-8 (L86) ( earlier post ), and on the Cadillac Escalade and Escalade ESV. In the 2015 Corvette Stingray, the new 8-speed enables a class-leading 29-mpg (8.1 gear used with previous six-speed automatic models, engine rpm is reduced by 8% (123 rpm) on the highway at 70 mph. l/100 km) EPA highway estimate—a 3.5%
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