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The NV4500 transmission (foreground) we used has a first-gear ratio of 5.61:1, which offers us great creeping-around gearing, and a 0.74:1 overdrive. The entire length of the transmission and bellhousing is 27 1/2 inches, just slightly longer than our TH400 at 27 1/4 inches (background). This transmission has been found behind big-block gas engines and heavy-duty diesels, so we feel that our relatively ho-hum 6.2 turbodiesel should in no way be taxing it.