Thanks so far for your help. It is hard for me to believe that a front diff it blown with out chunks blowing out the side of the case too. I hear nothing out of the ordinary with the 4 wd engaged, only the slight hum of more gears turning.

As for scenario#3 the front drive shaft turns but the front axel Cv or half do not. I do think the transfer case appears ok.

With the front lifted up I can spin the front tires and the axel/half shafts with them but I can not spin, by hand the drive shaft. If I spin one front tire in one direction the other front tire spins in the other direction, leading me to believe the spider gears are fine. And I hear no grinding noise. If I try to turn the tire back and forth both directions very quickly there appears that they are firmly engaged , they feel very solidly attached to each other.

I will do some more investigation tonight when I get home.

Thanks again for the help from you guys.

Dan
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