I guess I can understand the heat part pretty well, but it seems insignificant for a top speed blast. Actually, while it might be long term hard on parts, heat to some degree is good. For example you want heat in your gear boxes before you run you car be it at the dragstrip, roundy round, road coarse, etc. There is always a warm up period.
I really wonder about the extra horsepower to pull the overdrive. I am usually pretty good at figuring this stuff out, but this one has me stumped.
It would seem that if the final drive ratio is the same, then it is the same. I struggle to figure out where the horsepower absorption comes from in the overdrive situation, if the final ratio is the same. My assumption that is even if a rocket scientist does the equation, the net result is .07635 HP loss or something, LOL!
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