Later this month, six-cylinder Dodge Chargers and Chrysler 300s will begin arriving at dealers with eight-speed automatic transmissions. Until now, the Charger and 300 used an older Mercedes-Benz-designed five-speed autobox—and it performed well enough in our evaluations—but like all automakers, Chrysler has to pursue better fuel economy, as well as better acceleration and more bragging rights. Funk Flex Find Flex on Google +