When to Use Low-Range 4WD?
3 Answers
Low-range 4WD is used when high torque is required. Situations that demand high torque include intense off-roading, extreme hill climbing, vehicle recovery, etc. Additionally, it should be engaged when the road surface is particularly rugged with significant differences in wheel traction (e.g., when not all four wheels can maintain ground contact simultaneously). The characteristic of low-range 4WD is the use of a small gear driving a larger gear, allowing the engine to deliver greater torque output. Depending on the vehicle model, the torque multiplication ratio varies, typically ranging from 2.4x to 2.5x, with some systems capable of up to 4x amplification. Avoid using low-range 4WD mode in snowy or muddy conditions, as such high torque can easily cause the vehicle to become stuck.
When driving my 4WD vehicle on mountain roads or off-road, I often use low-range four-wheel drive, such as when climbing steep slopes or traversing deep mud. It provides stronger torque, allowing the vehicle to move slowly without slipping. I remember once on a rocky road, after switching, the wheels turned steadily, avoiding stalling or losing control. On paved and flat roads, don't use it normally, as it causes faster wear and consumes more fuel. Only activate it in critical situations like wading through water or towing heavy loads. Safety first—ensure the vehicle is stopped and in gear before engaging, and maintain low-speed driving for better safety.
As an owner of a full-time 4WD SUV, I find the low-range 4WD most practical in snowy or slippery conditions when speeds below 20km/h require more traction control. Last time I used it to steadily pull my boat up a slope without slipping; it's equally useful for steep climbs, just avoid overloading the engine to prevent damage. Remember to check system functionality in low temperatures to avoid malfunctions. Low-range mode provides excellent control, but don't overuse it for daily commuting - it saves fuel and protects your vehicle.
