Rock-Trac® 4WD
· The Rock-Trac® 4WD transfer case is the heart of Wrangler Rubicon's extreme rock crawling ability. Because of the 4:1 low-gear ratio, Rock-Trac's low crawl speed makes it easy to ascend or descend sharp inclines and to crawl over obstacles. Standard on: Wrangler Rubicon and Wrangler Unlimited Rubicon.
When to use:
High range: All road surfaces, including wet or snow-covered pavement, sand or gravel.
Low range: Conditions requiring added low-speed power, technical driving, and situations when added torque is helpful (e.g. pulling a boat trailer out of water).
Command-Trac I ™ 4WD
· This legendary part-time system has served Jeep® owners well through the years. Command-Trac is a proven shift-on-the-fly system with 2.72:1 low-range for rock crawling and neutral for flat towing. Standard on: Wrangler Sport, Wrangler Sahara, Wrangler Unlimited Sport and Wrangler Unlimited Sahara.
When to use:
High Range: All road surfaces, including wet or snow covered pavement, sand or gravel.
Low Range: Conditions requiring added low-speed power, technical driving and situations when added torque is helpful (e.g. pulling a boat out of water).
Command-Trac II™ 4WD
· Command-Trac II™ supports a two-speed, part-time four-wheel-drive transfer case. 2WD is the usual driving mode, with the front driveline disengaged from the transfer case and power directed to the rear wheels.
· Selecting 4WD Lock via the electronic, console-mounted switch, locks the front and rear drive shafts together.The two then rotate at the same speed and provide a 50 front/50 rear torque split, providing better traction on slippery surfaces. This transfer case allows for 2WD, 4WD high-range and low-range as well as neutral. Standard on all Liberty models.
When to use:
High Range: All road surfaces, including wet or snow covered pavement, sand or gravel.
Low Range: Conditions requiring added low-speed power, technical driving and situations when added torque is helpful (e.g. pulling a boat out of water).
Selec-Trac II™ 4WD
· Selec-Trac II™ is an active on-demand, shift-on-the-fly four-wheel-drive system. When driving in 4WD auto mode, the transfer case clutch pack can detect wheel slippage and instantly apply increased or decreased torque between the front and rear axles based on real-time driving conditions, thus optimizing traction.
· Under the right conditions, the vehicle can be driven by just one wheel. For added capability when traversing steep grades, rough terrain, or extremely poor traction surfaces, the transfer case includes a 4WD Low mode. Electronic shifting between 4WD Auto and 4WD Low is accomplished via a console-mounted switch. A 2WD mode is also provided. Optional on all Liberty models.
When to use:
High range: All road surfaces, including wet or snow-covered pavement, sand or gravel.
Low range: Conditions requiring added low-speed power, technical driving, and situations when added torque is helpful (e.g. pulling a boat trailer out of water).
Quadra-Drive II™ 4WD
· Quadra-Drive II's active full-time 4WD system is the ultimate for virtually any driving situation. This system uses the Quadra-Trac II™ transfer case and a rear Electronic Limited Slip Differentials, offering excellent tractive performance. Quadra-Drive II also features 2.72 low range and neutral.
Available on Grand Cherokee Overland
When to use:
High range: All road surfaces, including wet or snow-covered pavement, sand or gravel.
Low range: Conditions requiring added low-speed power, technical driving, and situations when added torque is helpful (e.g. pulling a boat trailer out of water).
Quadra-Trac I™ 4WD
· The brilliance of this 4WD system is its simplicity. Quadra-Trac I™ operates in a high-range all-time mode - delivering optimum traction in virtually any driving situation with no driver input required. The center differential splits the power — sending 48% to the front axle, 52% to the rear axle and quietly works with the standard Brake Lock Differential and Four-Wheel Brake Traction Control system to deliver confident all-weather traction.
Standard on Grand Cherokee Laredo
When to use:
High range: All road surfaces, including wet or snow-covered pavement, sand or gravel.
Quadra-Trac II™ 4WD
· This active full-time 4WD system functions in all-wheel drive until additional traction is needed, then reacts by electronically engaging the clutch pack to transfer up to 100% of the torque to either axle. This system also features 2.72:1 low range and neutral for flat towing
· Standard on Grand Cherokee Limited, Grand Cherokee Overland and available on Grand Cherokee Laredo.
When to use:
Virtually any driving situation
Freedom-Drive I™ 4WD
· Jeep® Compass 4x4 models with a five speed manual transmission or Continuously Variable Transmission come with the Freedom Drive I® 4WD, standard. This system features an Electromagnetically-Controlled Coupling that is attached to the rear differential. It monitors wheel slippage and transfers torque to the axle using it most. During high-traction driving (highway driving), this system transfers virtually no torque to the rear axle, but instantly transfers it to the rear wheels when conditions call for it.
The system also saves fuel by operating only on demand when driving in normal highway conditions, thereby minimizing power-robbing friction and inertia. 4WD LOCK shift-on-the-fly automatically sends the optimum amount of torque to the rear axle based on conditions. 4WD LOCK remains electronically "locked" under all conditions up to speeds of 35 mph.
· Standard on Compass and Patriot 4x4.
When to use:
High range: All road surfaces, including wet or snow-covered pavement, sand or gravel.
Low range: Conditions requiring added low-speed power, technical driving, and situations when added torque is helpful (e.g. pulling a boat trailer out of water).
Freedom-Drive II™ 4WD
· An electronically controlled coupling, attached to the rear differential, is the heart of the Freedom-Drive II® system. The electronic control module processes signals from the wheel speed sensors and the accelerator pedal to determine how much torque to transfer to the rear wheels, then sends an electrical current to the ECC that is proportional to the amount of torque required.
· Recommended for true off-road situations including steep grades, wheel lift and rock or log climbing, the Freedom Drive II® Off-Road Package includes a second-generation continuously variable transaxle with a 19:1 crawl ratio (CVT2L) that engages when the off-road mode is activated.
· Available on Patriot and Compass 4x4 with the Freedom Drive II® Off Road Group
When to use:
High range: All road surfaces, including wet or snow-covered pavement, sand or gravel.
Low range: Conditions requiring added low-speed power, technical driving, and situations when added torque is helpful (e.g. pulling a boat trailer out of water).
Quadra-Trac SRT8 4WD
The strongest t-case ever designed by the Jeep® brand, the Quadra-Trac SRT 4WD drive handles massive amounts of horsepower and torque produced by the mighty 6.4L V8 engine. This single-speed, electronic proportioning system is always active — automatically sending the optimum amount of torque to the front and rear axles based on conditions. Drivers can choose between five dynamic modes for specific driving conditions with the Selec-Track™ system: Auto, Snow, Tow, Sport and Track. Standard on the Grand Cherokee SRT8®
When to use:
All road surfaces, including wet or snow-covered pavement, sand or gravel.