My dealer is fix my transfer case, help choose gear oil.

[Killa]

Just back from the dealer, they finally fix the tranX case leak, replace all the seal and U-Joint. They put some kind of gear oil ( I hope it not tranmission fluid ). I been using Redline Heavy duty shock proof, for tranX and Rear diff. I order yesterday, and it should be here by Wed next week, I dont trust the fluid dealer put in for me, any one know any TranX case oil that I can use for couple day, what grade and brand is good ? thanks

Edit : Ya'll feel me !! , I just get under the car, and try to unplug the transfer case drain plug, I saw all the lug was new , you guy know what, the dealer is replace me BRAND NEW TRANSFER CASE , that thing is so shiny LOL. Im so happy now, I mix some valvoline 15w-90 with some red line heavy duty, and gonna run couple day, until red line fluid come.