4x4 Low Mode
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The high-low shift occurs when the reduction shift fork moves the high-low collar to lock the planetary gearset to the output shaft. Then, torque transmitted through the sun gear from the input shaft turns the front planetary gearset assembly. The front planetary gearset assembly is now engaged and provides transfer case speed reduction.