* 2H (2-Wheel High): This is the standard 2-wheel drive setting. Power goes only to the rear wheels.
* N (Neutral): The driveshafts are disengaged. Used for towing or repairs.
* 4H (4-Wheel High): Power is distributed to all four wheels, used for driving on slippery surfaces or for added traction in difficult conditions. Suitable for paved or hard-packed surfaces.
* 4L (4-Wheel Low): Power is distributed to all four wheels, but with a significantly lower gear ratio. Provides maximum torque for extreme off-road situations like steep inclines, mud, or snow. Should generally *not* be used on paved roads at higher speeds.
Important Considerations:
* Shifting on the Move: Never shift into 4L or 4H while the vehicle is moving at speed. Doing so can damage the transfer case. Shifts between 2H and 4H should be made at low speeds only (ideally under 5 mph), often requiring the clutch to be depressed. Engaging 4L is typically only done when completely stopped.
* Transfer Case Model: The exact location of the shift lever and the markings on the lever may vary slightly depending on the specific transfer case installed in your truck. Checking your owner's manual or a parts diagram for your specific year and model will provide the definitive answer.
* Freewheeling Hubs (if equipped): Many '82 Chevy pickups had manual freewheeling hubs. These must be engaged (locked) before 4WD can effectively work. If you have freewheeling hubs, remember to engage them before shifting into 4H or 4L.
Consult your owner's manual for the most accurate and safe operation instructions for your specific vehicle.
