While I don't definitively KNOW the history, I bought it from the original owner whose wife and later their daughter, daily-drove the car for ten years. Never modded, no major repairs, miscellaneous repairs done at dealer, Dad did the oil changes. I feel certain that the car was not raced/tracked/hooned but also fairly likely that the diff fluid was NEVER changed.50k miles before the whine manifested into a failure.
@MrSurly your diff certainly had seen better days, but most Vs with a history of consistent diff fluid changes rarely have issues. If you car was driven like a raped ape for 100k miles without any fluid changes, I would expect the inside to look similar to yours.
Thank you for the kudos!BTW, I'm going to use your diff cooler thread as a guide when I build mine. It's well documented and my hat it off to you, sir.