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A Ford Expedition is traveling at 75 mph in fourth gear (gear ratio = 0.67:1). The...

A Ford Expedition is traveling at 75 mph in fourth gear (gear ratio = 0.67:1). The tachometer reads 2100 rpm. The rear wheel radius is nominally 15 inches. What is the final drive (differential) ratio?

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FD.R Sec revolutions of cankshaft ISx2.sy-38.1Crり - o.381 mm F.D.R 1.36

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