I cannot find a single post with anyone experiencing the same noise. A couple close but nothing exact. I can tteven find any posts about people having front diff issues. Today I stumbled across this article on diff repair. This is the rear diff but my noise sounds similar excluding the “blip” hrs doing to make it sing (if you read how he can manipulate the noise). I just have the scraping grinding noise. Seems like I might need a front diff.
http://fixyourdifferential.weebly.com/