Full-Time 4WD operates by default in four-wheel drive and can travel safely and securely on all surfaces. The system uses either a clutch or a center differential to allow the front and rear wheels to turn at varying speeds. Whether the road is covered in snow or is dry as dirt, this system can be utilized confidently. Jeep offers a variety of four-wheel-drive systems for buyers of the new 2021 Grand Cherokee L to choose from. Called Quadra-Trac I, Quadra-Trac II, and Quadra-Drive II, each setup offers 7qAA.