I was gonna change the oil today on my ‘98 Sport. When I put pressure on the wrench to remove the plug there was a pop. I can now move the plug in either direction with just my fingers. It moves very freely, doesn’t go in, doesn’t come out. Thankfully, it’s not leaking. I’ve not had the pan off of a 4.0, but I guess there is something like a nut fastened inside for the plug to screw into that has come unfastened. Dropping the pan with a full load of oil will be interesting, but I guess that’s what I’ll do and try to MIG weld it back. August is hot, gonna wait until it cools off.