My Acadia is due for a front and rear differential service. Is that something that I can do in my own shop? I very much prefer to do my own work on my vehicles. I think that I am also due for the transfer case service. What does that entail? I recently had the transmission fluid flushed and changed. Had to pay for that one since I had no way to pump trans fluid. Although I plan to figure that out before next time. Suggestions on that would be good as well.