Part-Time 4WD System (Most Common):
This system is for use on low-traction surfaces like snow, ice, mud, or gravel. Do not use this system on dry pavement. Doing so can damage the drivetrain.
1. Shift the transfer case: Look for a lever or dial (usually on the floor console) that says something like "2WD," "4HI," and "4LO." "2WD" is two-wheel drive. "4HI" is four-wheel drive high range (for general off-road use). "4LO" is four-wheel drive low range (for extreme off-roading or low-speed situations requiring maximum torque).
2. Engage 4HI: To engage four-wheel high, bring the vehicle to a complete stop. Then, shift the transfer case lever or dial to "4HI."
3. Engage 4LO: Follow the same procedure as above, but shift the transfer case lever or dial to "4LO."
Important Considerations for Part-Time Systems:
* Speed: Engage 4WD *only* at low speeds, preferably while completely stopped. Engaging 4WD at higher speeds can severely damage the drivetrain.
* Dry Pavement: Avoid driving in 4WD on dry pavement, as this can cause binding and wear on components.
* Turning: Be careful when turning in 4WD, especially on hard surfaces, as the drivetrain can bind.
Full-Time 4WD System (Less Common):
A full-time 4WD system is automatically engaged and doesn't require a lever or dial for shifting between 2WD and 4WD. It may have a dial or switch for selecting different operating modes (e.g., "Auto," "4HI," "4LO"). Consult your owner's manual for specific instructions.
If you're unsure which system your truck has, or are uncomfortable engaging the 4WD system, consult your owner's manual. The manual provides specific instructions and diagrams for your particular model. It's the best source of information for your vehicle.
