Getting New Diff
My brothers car (XR6T obviously) went in today to get a new mag replaced under warranty, a blown fog light changed under warranty and a pcm flash. We also told them that there was some oil leakage around the diff. When we got back to the dealer they informed us that they have been directed by Ford to replace it. So we now await a new diff.
Apparently Ford are doing this to finally get on top of what is going on with these diffs. The diff we have in now is perfect, makes no noises, no clunks, and is beautiful. Our worst fear is getting a dud replacement.