Vehicle Questions and Answers
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The primary reason why the 4x4 mode isn't functioning properly on your 2002 Ford Explorer Sport Trac is likely because of a malfunctioning actuator in the transfer case. This prevents you from engaging 4x4 mode and keeps you in regular gear. Fortunately, a replacement for this component is affordable, ranging from $30 to $50 at most stores. However, the challenge lies in the labor-intensive nature of accessing and repairing this part in your vehicle. If you decide to have it serviced at a shop, the total cost could be anywhere between $300 and $600.
It's likely that there's an issue with the transfer case actuator. If someone is attempting to activate the 4-wheel drive, check to see if there is proper control. If control is present, deactivate the actuator and have it examined.