Normal Operation
WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
When operating in 4-wheel drive, the transfer case and both IWEs are locked. When in 4x4 low (4L), the transfer case low range gear set provides an additional 2.64 gear reduction. When operating in 2WD, the transfer case and both IWEs are unlocked.