Honestly that sounds more like a rock got stuck between a rotor and the caliper and/or pad. Constant almost ringing sound. You said it hasn't done it again?
that was my first thought , too , Kevin. I ( end of video I trimmed the part where I got out left cam on) got out thinking ," great , clump of dirt or gravel between backing plate for brake or rock wedged in the wheel assembly or brake pad ..."
I spent a half hour with the hi lift ( ) raised all four corners and rotated each ...when I got to the front and ( it wasn't locked ; recall this was all 2wd) spun the pssgr side is when I could hear it was not the brakes or wheels but coming from UNDER the middle ( I know my rigs pretty well) so I go around , start it and being on an slight incline , just let it roll at about .5mph downhill in neutral and (I'm in middle of no where mind you ) leaned out driver door and actually was low enough to see the spot it was coming from . the diff / back of differential ( I still wasn't thinking anything drive shaft here @ this point ..) .
at this point I'm thinking I've f-Ed my front R&P or something , I stop , hilift the front () and turn the wheel open to pin point it and that's when I was like safety conscious and said I shouldn't crawl under this out here alone if it's on a hi lift so I threw the running jeep into neutral left pbrake disengaged and laid in that road just enough to touch the yoke sleeve on the differential pinion opening connected to the 1310 DC woods DS & it totally was that metal collar that is where around the billet steel yoke adapter that comes with the front Jeep JKU driveshaft from Tom Woods has ....I figured it must be a u joint and it has not returned since I greased the crap out of it . I'm headed back to same spot this minute so I will report I a few hours . if you don't hear from me in a day , send help to the cheatham county wildlife refuge and nature center in Ashland City , Tn - cool?
( thanks for the help . I know ; weird ask heck that sound could be from a joint seems unlikely , right ? yeah, I checked the fluid in the diff it's ok )