After thought. Ended up with.oo8 back lash spec was .007-.009 This pic gives an Idea how it is measured. I got the magnetic base from Harbor freight for $10
I was inspired to write this after reading another thread on this forum and there was more than one recommendation to leave rear end alone and take it to a pro.
Hopefully after reading this you can better judge if you have the tools and skills to tackle a full or partial rebuild.