Lower Drive Unit: Operation
WARNING: This page is about a different car, the 2004 Dodge Grand Caravan, 2004 Dodge Caravan, and 2004 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
During a power open or close cycle, the power drive unit is driven by the flex drive assembly. The lower drive units main gear engages the lower door tracks rack teeth, this moves the side door assembly accordingly.