Isolating noise when in 4wd. 72K10 Help please

[Vanhalen1985]

Well fellers I discovered the root cause of the noise. I'm embarrassed by it but oh well. When I bought my new be Goodrich all terrain tires I went a size smaller in the front than in the back. It never even occurred to me that this would throw off my diffrential ratio and cause things to bind. Luckily no damage done except that to my pride.