If you don't mind, how much did you pay for the t-case and diff services? I'm doing those soon and don't know how much it'll cost me. Yeah, the pic seemed to show no tread, but its just a pic.
It wasn't very expensive. Got it done at a Jiffy Lube for around $150. Or for half that cost you could just drain/refill yourself for just the cost of the SAE 80-90 oil, provided you know how to change your own engine oil and you have a drain bucket.

I wasn't in a position to be able to do these services myself, otherwise I would have saved some money. Jiffy Lube also replaced my serpentine belt for ~$80. I got the works done to it before I drove the 5 1/2 hours home.