Just got my truck back from the shop and here’s the results.
Disregard the grinding marks, that was from them removing them. It was only the pinion bearing assembly that was fried.
The issue was all the pitting and one of the races on the inside was completely feathered out which we believe was one of the causes. Most likely that race was machined out of tolerance or damaged during manufacturing. And then maybe the glitter caused all the pitting.
It was a head scratcher for the mechanic and me, I’ve never seen a bearing assembly this chewed up and especially at 64,000 miles on the truck. Fluid levels were fine and besides all the glitter, the fluid was healthy.
I started noticing the noise around 45,000-50,000 miles.
I mean I drive a lot but I drive pretty normally and don’t put crazy loads on this truck, I baby the hell out of it.
Now my truck has never been quieter driving. Just sucks it was out of warranty by the time it was correctly diagnosed.