Hello, I am new to a Dodge Durango (2011 Citadel) and I have few problems to fix. Power steering looses fluid and it looks like it is coming from the connection in the return line between the gearbox metal line and the rubber hose going to the cooler. Looking at the parts listings, most show only the metal line, such as the Sunsong part 3602873.

How does this connection work? The black plastic ring slides up the metal line, and the metal line rotates easily in the fitting on the end of the rubber hose. How does this connection come apart? And I assume there is an o-ring inside that connection.

Anyone have any ideas?