2015 Chevrolet Corvette Z06 features an all-new eight-speed auto January 14, 2014 1080 × 1221 2015 Chevrolet Corvette Z06 – A 625HP Track Shredder [w/video] The 2015 Corvette Z06 features an all-new eight-speed automatic, designed and built by GM, that is more than 8 pounds (4 kg) lighter and five-percent more fuel efficient than the six-speed automatic.