any mechanic is better then any quick lube place. but why even do that. save yourself the dough. it's just a couple of bolts on the t-case and diffs. pull the upper bolts first then the lower, let it drain, plug the lower holes and fill throught the upper, replace those bolts and you're done. as to the tranny, that's a little more involved and may be worht the $. just my 2c.
i'll post up on what the dealer says. i am also going to ask about dexcool on another forum that i am sure peeps know for sure.