Article
GM’s new 8-speed automatic may enable 30-mpg Corvette in 2015
2014-01-29
The all-new 8L90 was developed in house. GM claims it improves the Corvette’s powertrain efficiency by up to 5% versus the 6L80 and provides faster gear changes. It is over 8 lb (3.6 kg) lighter than the 6-speed while being equivalent in overall size.