Japanese Engineers Tore Down a Brand-New Ford — What They Found Inside

Forever Engine

Forever Engine

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The reputation of the Japanese car in your driveway goes back to a truck that kept breaking in 1935. That September, a handful of Japanese engineers took it on a six-day test drive through the mountains west of Tokyo. They'd built its rear axle by copying a brand-new Ford, part for part. But somewhere on those mountain roads, the axle housing cracked right at the weld. So why did a perfect copy fail? The answer was hidden inside that Ford the whole time, and chasing it would eventually lead them all the way to Ford's biggest factory in Michigan.