4WD low range is useful for:

4WD low range is specifically designed to enhance the vehicle's performance in challenging terrain and off-road conditions. When engaged, this mode provides extra pulling power, making it ideal for situations where a truck needs to navigate steep hills, rocky ground, or muddied paths. The lower gear ratio increases torque, thereby allowing the vehicle to exert more force and maintain better control.

This is particularly advantageous when towing heavy loads or when traction is compromised. In contrast to the other options, which are either unrelated to the functionality of low range or involve trade-offs that low range does not address directly, extra pulling power is the primary benefit. It enables the driver to tackle demanding environments without risking the engine stalling or losing momentum.