Jeep offers three four-wheel-drive systems on the Grand Cherokee, and all three are the permanently engaged type. Quadra-Trac I, standard on four-wheel-drive Laredo models, splits power 50/50 between the front and rear axles, and there are no switches or levers to control the system.
Quadra-Trac II automatically transfers power from wheels that slip to the wheels that grip and can send 100 percent of torque to the front or rear axle. It has a two-speed transfer case (instead of single-speed) with a low range engaged by a dashboard switch for off-road driving. This system is standard on four-wheel-drive Limited and Overland models and optional on Laredos.
Quadra-Drive II also can transfer power front and rear and has a low range, plus it has an electronic limited-slip rear differential that apportions power between the rear wheels. Quadra-Drive II is standard on Overland models with the 5.7-liter V-8 and optional on Laredos. In addition, Quadra-Trac II and Quadra-Drive II come with Jeep's Selec-Terrain system, which allows setting the powertrain, brakes and suspension for different conditions — Sand/Mud, Snow, Rock, Auto or Sport.
See if your question has already been asked and answered
Your question has been successfully submitted to Ask.cars.com. It will now be reviewed by our editors and we'll answer it soon if we think it's a useful question. You will be notified via e-mail when the answer is posted. Ask.cars.com tackles your questions about new cars and the car-buying process. Unfortunately we can't answer questions regarding:
Have our experts answer any of your questions about new cars.
Email us at firstname.lastname@example.org