It's only been a year since General Motors launched its 6T40 six-speed automatic ... this new transmission brought with it a five percent bump in fuel efficiency. The engineers at GM Powertrain ...

GM claims about 30 ... Niro PHEV with a dual-clutch auto is probably a good bit of fun. After Hyundai/Kia, Mazda has the biggest crush on six-speed automatic transmissions. I remember once asking ...