Power Transfer Unit Leaks From the Top Vent
WARNING: This page is about a different car, the 2018 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
If equipped with a vent hose, check for a missing or disconnected hose. If the PTU vent hose is present and attached correctly, check the PTU fluid level. If the PTU fluid is overfilled, replace the intermediate shaft seal, and input shaft seal. REFER to: Transfer Case Input Shaft Seal . REFER to: Intermediate Shaft Seal .