Checked and topped off the rear diff.
Found my scraping noise. The heatshielding that is between the exhaust and driveshaft was touching slightly. Long bar and just bent it out of the way a bit. Also looks like my exhaust is sitting pretty close, maybe pushing up on the heatshield during engine movement? It's also interesting that I've seen many posts about having to bend the subframe bracing for exhaust clearance. I have plenty in that regard. I don't doubt that all the ice/snow that the car seen this Winter has something to do with this. But at least I know what it is now, localizing a side from inside driving was about impossible.
It's also worth noting that the rub may be due to a worn center support bearing. I have new along with guibo. I just don't have ambition to drop this ill-fitting exhaust quite yet. Still healing from my fuel pump debacle.
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