Larry, I think I know the noise you are talking about. I had that noise after I changed the fluid in my Isuzu trooper diffy. (Every time) Even though I used gear oil that was supposed to have the special additive for limited slip, I had to add a little more of the additive. It took me forever to figure out what it was. It sounded like the tires must have been rubbing. Drove me crazy for a really long time.
Anyway, bummer about all the troubles. At least you have lots of new stuff!