New to this site and I am so glad I found it. Especially this thread. I bought a 2012 journey and 5 months ago it started making this noise. Stopped driving it to figure out what was wrong. I can handle small repairs but thought I would take this on too. I removed differential and found 2 small holes on the top, one for each side. So fluid leaked out of one side and fluid got into another. The differential and coupler are both gone. Everything looked good when I bought it. Finally, have a second hand unit and everything looks really good. Some one told me recently the coupler was suppose to be wet but I was sure the coupler was suppose to be dry. I have been frantically trying to find information before install. Thank you everyone for being so informative. Removing the driveshaft to make it fwd while I waited never occurred to me.
