Sir Issac Newton says:

[DMcClenaghan]

..and as every mechanical person, government economist, and helicopter pilot knows, for every action there is an equal and opposite REaction. Or, "Everything Effects Everything". I'm wondering as I read these pages about increasing power and torque, what is the downside? It is obvious that the stock automatics were built to handle the factory set power and not an inch lb. more, and fuel economy can suffer, but how about the cooling system? Can it handle the increased engine cooling as well as the higher load from the intercooler? How much can the transfer case take, as well as the drive shafts, U joints, and differential?
Also, some have figured out how to switch off the vacuum and allow 2WD in low range for trailer maneuvering. This sounds like a good idea, but I have believed that part of the reason the factory doesn't design this into the truck is because one axle can't handle all the resulting torque from low range. What is worse: running one axle on low range or maneuvering a trailer on pavement with 2 axles fighting each other?
Thanks for your comments!