GM’s upcoming 8-speed automatic, dubbed the 8L90, will be a cornerstone of their new rear-wheel drive cars – and the 2015 Corvette lineup will be among the first to get it.
Back in December, our own Ronnie Schreiber gave us a preview of the new 8-speed gearbox via a leaked SAE paper. Although it carries the same footprint as the outgoing 6L80, the 8L90 is full of improvements. First gear is shorter, for better acceleration, while fuel economy is said to be improved by 5 percent across the board. With 6-speed automatic C7 able to hit 28 mpg on the highway, a 5 percent gain translates to 29.4 mpg – but it wouldn’t be shocking if Chevy pulled out all the stops to hit the magical thirty em pee gee number, if only for marketing bragging rights.
Along with the Corvette, the 8L90 is expected to appear on other rear-drive cars, as well as trucks. The addition of the 8-speed auto will certainly be a nice boost for GM’s full-size SUVs and pickup trucks, not to mention rear-drive Cadillacs and the upcoming Camaro.