Hey there!! I have the great instructions on how to change the manual trans fluid in this beast. Is it really as simple as draining from the lower drain hole and refilling with the top? Is having a Torq wrench a must? I can usually tell when I take the bolts out how thight they were. Trying to save as much as I can and service myself. I already do the fuel, oil, air, filters. Haven't tried the rear diff on my own yet. . thanks!!