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GM: Camaro ZL1's 10-speed shifts faster than Porsche's dual-clutch

by Justin King

The new Hydra-Matic transmission is said to be 36 percent quicker from first to second.

General Motors claims the 2017 Chevrolet Camaro ZL1's 10-speed automatic transmission is significantly faster shifting than Porsche's PDK dual-clutch gearbox.

The new Hydra-Matic is said to be 36 percent faster than a PDK from first to second, while the two-three and three-four upshifts are 27- and 26-percent faster, respectively.

"The shifts happen so quickly and without delay that it almost feels like an extension of your reflexes," said ZL1 lead development engineer Aaron Link. "It's a much more involving experience for the driver that really helps improve confidence and performance on the track."

GM expects the ZL1 to be the first volume production car to be outfitted with a 10-speed transmission, advancing from the sixth-generation Camaro's eight-speed unit. As an added bonus, and also helpful in appeasing regulators, the extra gears help maximize efficiency.

The transmission integrates four gearsets and six clutches, including two brake clutches and four rotating clutches. Despite the extra clutch and two more gears, the housing roughly the same size as the eight-speed unit. It must contend with 640 horsepower and 640 lb-ft of torque from the ZL1's supercharged 6.2-liter LT4 engine.

GM expects the 10-speed automatic to spread across at least eight models within the next two years.

Live images by Brian Williams.

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