* Part-time 4WD: This system is designed for off-road use only and should *not* be used on dry pavement. Engaging and disengaging usually involves a lever, dial, or button, often labeled "4WD," "4H," or similar. The exact location and operation will vary by vehicle, but usually, simply shifting the lever/dial/button to the 2WD (or similar) position will disengage 4WD. It's crucial to do this only at low speeds (under 20 mph/30 km/h) to avoid damaging the drivetrain.
* Full-time 4WD or Automatic 4WD: These systems automatically adjust the power distribution between the front and rear axles. Disengaging these systems is usually not possible; they are always engaged, though the power distribution might vary depending on driving conditions. Some vehicles might have a setting to favor rear-wheel drive (e.g., "Auto," "2H," "4H," "4L"). Check your vehicle's owner's manual for specifics.
Always consult your owner's manual. It will have diagrams and precise instructions for your specific vehicle's 4WD system. Ignoring the instructions can lead to drivetrain damage. The location and operation of the 4WD controls can vary significantly between makes and models.
