A question I've always had but never thought to ask... When these are strapped down to the dyno, do you remove the front drive shaft? I was thinking, that front shaft spinning into the front diff at 70 mph or so, and the front diff not spinning, the shaft only spins inside a bushing. I would think it would wear it out quick, and what if you accidentally hit it into 4x4. I know it wont kick in till you get slow but I still bet it would screw something up.