General Motors will offer a new eight-speed automatic transmission in the next generation of full-sized pickups and SUVs it plans to launch in early 2013.
GM is expected to begin producing its homegrown transmission at its Toledo powertrain plant by the end of 2012 for use in trucks. Eight- and nine-speed transmissions are among the tactics automakers are using to meet more stringent fuel economy standards.
By using more gears to make more efficient use of fuel, an eight-speed can boost efficiency by 3 to 6 percent, depending on the vehicle, says Mike Omotoso, senior manager of global powertrain forecasts at LMC Automotive in suburban Detroit.
V-8 engine versions of GM's current full-sized pickup, the Chevrolet Silverado get 15 mpg in city driving and 21 mpg on the highway with six-speed trannies.
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