BigBear

Nearly all the comments have favoured all wheel drive, especially on wet or slick roads which is great. The other comment which got me thinking was the one comment about using the all wheel drive on EXTREME grades on dry roads. Thinking about this I realized that I have a steep driveway and if I try and back the trailer up in 2 wheel drive even on dry pavement, the rear tires spin so I am forced to put it in all wheel drive. So putting it in all-wheel drive makes sense to me on very steep grades even on dry pavement. Perhaps this will also split my 285 hp to the two axles separately causing less stress on the single axle/differential only under very heavy pulling. I guess it depends on what actual vehicle you have and how much the truck actually transfers the loading. However I would expect any shifting/transferring of loading/stress would be a benefit in this situation.