All-wheel drive (AWD) uses a center differential to direct a percentage of the power to both axles, depending on conditions. All wheel drive is not designed specifically to go off road but is for traction in rain, snow or ice on the road. Body-on frame SUVs are typically designed for off-road use. Unibody crossovers are usually only equipped with the lighter-duty all-wheel drive. However the unibody built Grand Cherokee and newly designed Durango are available with four-wheel drive.