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By that we mean, how much horsepower it takes to spin the torque converter, the transmission, driveshaft, pinion, differential gears, axle shafts and even the wheels. On average, it takes about 20 percent of the engine's horsepower to move everything. At SPELAB, we pride ourselves on our stringent quality control and innovative product development. Each part is rigorously tested to ensure it meets our high standards of performance and durability. Built to Perform You count on your truck to handle wha