Well no joy-in fact we are now in a pickle
The passenger side rear axle is BENT!
So, in other words-the front is all ready to go, we have all the stuff swapped over to the new rear axle, and wer getting ready to fill with fluid, when we noticed the caliper moving in and out 1/4 to 3/8" while rotating the pinion shaft.
And, to be honest, the insides look cooked. I am no expert but everything metal in the diffy is blackened. I will post a picture--
Now, this is where it is time for the person he bought it from to step up and help out a bit. At his point that is all I will say on the matter. If the seller will make this right, I will praise him well for it.
On the other hand---
Yeah, this is rather upsetting