Differential lock is a unique feature of the front differential on Suzuki 4-wheel drive models. The differential lock can be used only in the "super low" sub-transmission range whenever maximum traction is needed. In standard 4WD, power is transferred equally to the front wheels while they are pointed straight ahead. However, when the front wheels are turned they must rotate at different speeds requiring the differential to alter the power transfer to each wheel. This is similar to a rear differential of a car. This slightly reduces traction but keeps steering effort to a minimum. In differential lock mode however, power transfer to each front wheel is kept equal regardless of the steering position. This provides maximum 4WD traction but increases the steering effort slightly. This is why this feature can be used only in the "super-low" sub-transmission range.