2004 Jeep Grand Cherokee Owner's Manual - Page 191

STARTING AND OPERATING 191 5 km/h). Avoid attempting to engage or disengage 4LO with the vehicle moving faster than 2 to 3 mph (3 to 5 km/h). Quadra-Trac II Operating Instructions/Precautions - If Equipped The Quadra-Trac II transfer case is fully automatic in the normal driving 4 ALL TIME mode. The Quadra-Trac II transfer case provides three mode positions - four wheel drive high range, neutral, and four wheel drive low range. This transfer case is fully automatic in the 4 ALL TIME mode. The 4 ALL TIME mode transmits torque to the rear axle during normal driving, similar to a rear wheel drive vehicle. When speed difference is increased between the front and rear driveshafts the majority of engine torque can be transmitted to the front driveshaft. When additional traction is required, the 4LO position can be used to lock the front and rear driveshafts together and force the front and rear wheels to rotate at the same speed. The 4LO position is intended for loose, slippery road surfaces only. Driving in the 4LO position on dry hard surfaced roads may cause increased tire wear and damage to driveline components. When operating your vehicle in 4LO, the engine speed is approximately three times that of the 4 ALL TIME position at a given road speed. Take care not to overspeed the engine and do not exceed 25 mph (40 km/h). Proper operation of four wheel drive vehicles depends on tires of equal size, type, and circumference on each wheel. Any difference will adversely affect shifting and cause damage to the transfer case. Because four wheel drive provides improved traction, there is a tendency to exceed safe turning and stopping speeds. Do not go faster than road conditions permit. 5