Posts Tagged ‘9-speed transmissions’

Gearing Up: New GM/Ford 10-Speed Automatic Part of Transmission Revolution

How many gears are too many?

by on Oct.03, 2012

The 2013 Lexus LS is one of a growing number of vehicles with advanced 8-speed automatics.

General Motors and Ford have confirmed they will jointly develop a new generation of fuel-efficient automatic gearboxes. What they aren’t saying is that the new transmissions will use as many as nine and even 10 different gears in an effort to minimize fuel-consumption, about twice the number of gear ratios used in most of today’s automatics.

While it’s common to have a 21-speed bicycle and most big 18-wheel trucks use nearly as many speeds, the transmissions Ford and GM will develop are a significant step beyond what was normally considered necessary in the automotive environment. And that underscores the pressure manufacturers are feeling as they face the 37.5 mpg Corporate Average Fuel Economy standard going into effect in 2016 and the 54.5 CAFE rules to follow in 2025.

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But is there a point of diminishing returns?

“Ford and GM have a very successful history in designing and jointly producing automatic transmissions,” a Ford spokesman told, adding that, “We can confirm…that we have signed an MOU (a Memo of Understanding) to jointly collaborate in the development of a variety of all-new, fuel-efficient transmissions.”


Chrysler Going Mainstream with 8-Speed; 9-Speed Automatic Coming

New gearboxes cut “a chunk” out of fuel consumption.

by on Sep.01, 2011

V-6 versions of the 2012 Dodge Charger will get the new 8-speed gearbox, as will the V-6 Chrysler 300.

Chrysler will become the first automaker to go mainstream with a fuel-saving 8-speed automatic gearbox, but has learned the Detroit maker is also developing an even more efficient 9-speed transmission.

Automakers are searching frantically for ways to improve mileage as they struggle to meet the 35.5 mpg fuel economy target for 2016 – and the 54.5 mpg standard recently enacted for 2025.  While all sorts of advanced – and expensive – options are under study, makers like Chrysler have realized they can achieve significant efficiencies simply improving the transmissions already found in every car on the road.

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The new Chrysler 8-speed will debut on the V-6 versions of the Dodge Charger and Chrysler 300.  They will deliver a full 4 mile per gallon increase in highway mileage, boosting the Dodge sedan to 31 mpg on the highway.

“That’s a chunk,” said Chrysler spokesman Vince Muniga, who also confirmed that “We’re working on a 9-speed” automatic gearbox that is expected to be even more efficient.