There were two Chunks of metal about a quarter inch in size as well as the gear oil had a very cool metallic look to it in the sun. :rolleyes:

Actually just spoke with my SA and they are going to replace the whole rear differential.

I'm actually glad to have found this and owe it to Shrock as I wouldn't have looked at the gear oil until I had to and may have been stranded somewhere.

BTW - My manual said to use 75W-140 Synthetic oil, which I bought at Nissan for about $20/quart. It only used about 1 and 1/8th quarts to fill to the opening.