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7) Is there any advantage to using premium oil (synthetics like Mobil-1) in the tranny and t-case?


Do a search for +transfer +case +fluids, if I remember correctly the txfr case and tranny use regular engine oil. In fact, the fill plugs have Engine Oil stamped on them. When I changed mine I just used dino oil, but I added Lucas manual tranny additive. FWIW, Lucas products work great, in my experience.

One note- make sure the new oil is room temp if possible. I changed mine back in Feb and the Lucas got cold and was a pain to pump into the tranny...