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ZF boss thinks 9 speeds is enough for transmissions

The nine-speed transmission might be where the race to add gears ends, ZF Friedrichshafen CEO Stefan Sommer said. He referred to nine speeds as the "natural limit" because going beyond that number adds weight and complexity that cannot be offset by gains in fuel efficiency. "There is no hard line, but you have to consider the law of diminishing returns.

Local Motors launches Pacific Northwest competition

Local Motors' 20th design competition, themed 'Thrive in the Elements,' opens for submissions starting today, 17 March. The new American car company is calling for entrants to design a car based around the four core elements: Earth, wind, fire and water; challenging designers to create a vehicle that will 'inspire Pacific Northwesterners to thrive'. The deadline for entries is 30 March 2010.

Mercedes-Benz SLC supercar spied on the road

There is life after the SLR for Mercedes, and spy shooters have caught plastic-clad versions of the new SLC that's due for 2011. We've seen this car before, but it continues to make us lick our chops. Previous shots showed gullwings, which these prototypes appear to have, though the doors are closed.