Two Speed PTU
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If the PTU actuator is functional and is being removed to correct a fluid leak, the PTU should be placed in the 2WD mode before removing the PTU from the vehicle. If the actuator is not functional the actuator can be removed when the PTU is not in the 2WD mode, but it will be difficult to install the shift forks on the shift sleeves.