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Jeep Trail Rated 4WD systems

Learn more about each of the Trail Rated Jeep Four Wheel Drive systems

The Jeep® brand has always been about choosing your own path. Our incomparable range of sophisticated 4WD systems let you find your own way up, down, through or around almost anything. Jeep 4x4s are champions in all-weather capability so you'll be ready for anything Mother Nature throws your way.

Rock-Trac®

The Rock-Trac 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: 2012 Jeep Wrangler Rubicon and Wrangler Unlimited Rubicon.

The Rock-Trac® 4WD system delivers more control, more torque at the wheels and lets you go virtually anywhere you point it. The Rock-Trac 4:1 low-gear ratio and crawl speed provides the Rubicon with greater torque at the wheels - making it easier to trek over obstacles like large rocks and timber and ascend or descend sharp inclines.

When to use Rock Trac:

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 ™

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 and Neutral. Standard on:

2012 Jeep Wrangler Sport, Wrangler Sahara, Wrangler Unlimited Sport and Wrangler Unlimited Sahara.

Command-Trac® 4WD splits torque 50 / 50 to the front and rear axles for off-roading or conditions where more traction is required. The main case joint is clamped by 18 bolts for added structural stiffness.

When to use Command-Trac:

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 II™

Command-Trac II supports a two-speed, part-time four-wheel-drive transfer case.  It features 2WD, 4WD high range and low range, as well as neutral. 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 driveshafts 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 2012 Jeep Liberty models.

When to use Command-Trac II:

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).

Selec-Trac II™

Selec-Trac II™ supports a two-speed, full-time active "on-demand" four-wheel-drive transfer case. 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 2012 Jeep Liberty models.

Selec-Trac® II is an active, on-demand, shift-on-the-fly 4WD system. It offers a full-time 4WD high range that requires no driver input. 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.

When to use Selec-Trac II:

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™

 

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 Electronic Limited Slip Differentials in both axles, offering excellent tractive performance. Quadra-Drive II also features 2.72 LOW-RANGE and NEUTRAL. Optional on Grand Cherokee North Edition/Limited.

When to use Quadra-Drive II:

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™

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.

Standard on: Grand Cherokee North Edition/Limited.

Quadra-Trac I® 4WD 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.

When to use Quadra-Trac I:

High range:

All road surfaces, including wet or snow-covered pavement, sand or gravel.

Quadra-Trac II™

   

This active full-time 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.  Optional on: Grand Cherokee North Edition, Limited

Quadra-Trac II® is an active, full-time 4WD system that functions in 4WD until additional traction is needed. It then reacts by electronically engaging the clutch pack to transfer up to 100% of the torque to either axle. The system works with the Brake Lock Differential and Four-Wheel Brake Traction Control systems to deliver confident all-weather traction. The Quadra-Trac II 4WD system also features a 2.72:1 low range and neutral for flat towing.

When to use Quadra-Trac II:

Virtually any driving situation

Quadra-Trac SRT™

Quadra-Trac SRT is an active, full-time 4WD system designed by SRT8® engineers to offer extreme traction on the street and track. 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.

NOTE: The Grand Cherokee SRT8 uses an on-demand system that drives the rear driveshaft and engages the front driveshaft when needed, either when slip is sensed, or with throttle anticipation, which engages the front prior to slip when throttle is applied.

When to use Quadra Trac SRT:

High range:

All road surfaces, including wet or snow-covered pavement, sand or gravel.

Freedom-Drive I™

   

2012 Jeep Compass 4x4 models with a five-speed manual transmission or Continuously Variable Transmission feature standard Freedom-Drive I. This state-of-the-art electronic system anticipates the need for added traction and responds to wheel slippage or accelerator pedal position by transferring power to the rear wheels, while modulating rear wheels to contribute to vehicle stability in cornering situations.

The system also saves fuel by operating only on demand when on-road, thereby minimizing power-robbing friction and inertia. A 4WD LOCK mode, providing a locked 50/50 torque split between front and rear at low speeds for severe road or trail conditions is activated by pulling up on the chrome T-handle switch labelled 4WD LOCK in the centre console. Standard on Compass and Patriot 4x4.

The Freedom Drive I™ 4WD 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. 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.

When to use Freedom Drive I:

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™

A 4WD LOCK mode, providing a locked 50/50 torque split between front and rear (at low speeds) for severe road or trail conditions is activated with a T-handle switch labelled 4WD LOCK in the centre console. 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 Transmission (CVT2L) with a 19:1 crawl ratio that engages when the off-road mode is activated. Optional, with the Trail Rated Off-Road Group on the 2012 Jeep Patriot 4x4.

An electronically controlled coupling, which is 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. It 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.

When to use Fredom Drive II:

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).