Willie Racine's Jeep
1650 Shelburne Road South Burlington, VT 05403Sales: (888) 582-3455
- Service: (888) 537-5642
- Parts: (866) 890-2685
Print
Jeep 4X4 Explained
Command-Trac®
Vehicles: Jeep Wrangler, Wrangler Unlimited
This legendary part-time system has served Jeep owners well through the years. Command-Trac is a proven shift-on-the-fly system with a 2.72:1 Low-Range and Neutral.
Command-Trac II®
Vehicle: Jeep Liberty
Command-Trac II® supports the new MP 1522 two-speed, part-time four-wheel drive transfer case, featuring smooth operation, shift-on-the-fly capability, and improved NVH control compared to systems with mechanical linkage. 2WD High 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.
Selec-Trac II®
Vehicle: Jeep Liberty
Selec-Trac II supports the new MP 3022 two-speed, full-time active "on-demand" four-wheel drive transfer case. When driving in 4WD Auto mode, the transfer case clutch pack detects wheel slip and applies 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 tractions surfaces, the transfer case includes a 4WD Low mode. Electronic shifting between 4WD Auto and 4WD is accomplished via a console-mounted switch. A 2WD mode is also provided for some markets.
Quadra-Trac I®
Vehicle: Jeep Grand Cherokee
The brilliance of this 4WD system is it's 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.
Quadra Drive II®
Vehicle: Jeep Grand Cherokee
Quadra-Drive II's active full-time 4Wd system is the ultimate for virtually any driving situation. This system uses the Quadra-Trac transfer case and Electronic Limited Slip Differentials in rear axle offering excellent tractive performance. Quadra-Drive II also featured a 2.72 LOW-RANGE and NEUTRAL.
Freedom-Drive I®
Vehicles: Jeep Patriot, Jeep Compass
Jeep® Compass models with a 5-speed manual transaxle or continuously variable transmission feature selectable four-wheel-drive lock. This state-of-the-art electronic system anticipates the need for added traction and responds to wheel-slippage by transferring power to the rear wheels, while modulating rear-wheel 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. Activate the off-road mode by pulling up on the chrome T-handle switch labeled 4WD LOCK in the center console. This mode dictates that the electronic sends the maximum amount of torque to the rear axle for improved traction.
Freedom-Drive II®
Vehicles: Jeep Patriot, Jeep Compass
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, 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.
Vehicles: Jeep Wrangler, Wrangler Unlimited
This legendary part-time system has served Jeep owners well through the years. Command-Trac is a proven shift-on-the-fly system with a 2.72:1 Low-Range and Neutral.
Command-Trac II®
Vehicle: Jeep Liberty
Command-Trac II® supports the new MP 1522 two-speed, part-time four-wheel drive transfer case, featuring smooth operation, shift-on-the-fly capability, and improved NVH control compared to systems with mechanical linkage. 2WD High 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.
Selec-Trac II®
Vehicle: Jeep Liberty
Selec-Trac II supports the new MP 3022 two-speed, full-time active "on-demand" four-wheel drive transfer case. When driving in 4WD Auto mode, the transfer case clutch pack detects wheel slip and applies 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 tractions surfaces, the transfer case includes a 4WD Low mode. Electronic shifting between 4WD Auto and 4WD is accomplished via a console-mounted switch. A 2WD mode is also provided for some markets.
Quadra-Trac I®
Vehicle: Jeep Grand Cherokee
The brilliance of this 4WD system is it's 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.
Quadra Drive II®
Vehicle: Jeep Grand Cherokee
Quadra-Drive II's active full-time 4Wd system is the ultimate for virtually any driving situation. This system uses the Quadra-Trac transfer case and Electronic Limited Slip Differentials in rear axle offering excellent tractive performance. Quadra-Drive II also featured a 2.72 LOW-RANGE and NEUTRAL.
Freedom-Drive I®
Vehicles: Jeep Patriot, Jeep Compass
Jeep® Compass models with a 5-speed manual transaxle or continuously variable transmission feature selectable four-wheel-drive lock. This state-of-the-art electronic system anticipates the need for added traction and responds to wheel-slippage by transferring power to the rear wheels, while modulating rear-wheel 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. Activate the off-road mode by pulling up on the chrome T-handle switch labeled 4WD LOCK in the center console. This mode dictates that the electronic sends the maximum amount of torque to the rear axle for improved traction.
Freedom-Drive II®
Vehicles: Jeep Patriot, Jeep Compass
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, 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.
HOW ROCK-TRAC® 4WD WORKS
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:
- 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).