Modernized as the C7 Corvette is, automatic models still use a six-speed automatic. That won’t be the case much longer and an SAE technical paper is revealing key details about the new slushbox.
General Motors hasn’t been keeping the Corvette-bound eight-speed a secret, but the paper reveals that its new automatic will stomach up to 738 lb-ft of torque and an overall ratio spread of 7.0. That will allow the Corvette to accelerate more quickly from a stop while saving fuel at cruising speeds. The paper didn’t say so, but the increased capacity could hint at future power increases for future Corvette variants.
The paper, which specifically names the Corvette, also says by using aluminum and magnesium components, the transmission “yields competitive mass.”
It isn’t clear when the transmission will be offered, but there is a good chance that the Corvette will crest the 30-mpg mark when it does. Current automatic Stingrays are rated for up to 28 mpg on the highway with the six-speed automatic or 29 mpg with the seven-speed manual.
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