Power Transfer Unit Leaks From the RH Side
WARNING: This page is about a different car, the 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
If the leak is automatic transmission fluid, the intermediate shaft seal needs to be replaced. REFER to: Intermediate Shaft Seal .
If the leak is brown/black gear lube at the case to cover seam, the power transfer unit input shaft seal - RH seal and cover O-ring needs to be replaced. REFER to: Transfer Case Input Shaft Seal RH .