Power Liftgate Rod
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
The power liftgate rod is mechanically connected to the power liftgate motor and can be serviced separately. The power liftgate motor drives a cable within the power liftgate rod which rotates a worm gear assembly to raise and lower the liftgate.