NEW YORK – Active buyers who want to get in touch with their sportier side – or who just want to navigate the urban jungle in a sportier ride – will make tracks to the Chevrolet Trax, an urban front-wheel-drive crossover concept with a twist: This micro SUV has an electric limited-slip differential that features an independent battery pack and an electric motor to drive the rear wheels, providing a low-cost all-wheel-drive system.