Well I can say the only vehicles I drive that have 43mph not sounding like an explosion under the hood are bikes. My brother's 750 nighthawk would do 60mph in first. My brother-in-law's bike with a "torque" chain gear (vs. high speed) would do 110mph in second. But that was at 13000 rpm :P
But you're right, MOST vehicles you will notice 43mph in second.
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