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Rear Axle

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With stock Detroit No-Spin differentials (Detroit Lockers), 4.88:1 gears and 2 1/2-inch axleshafts, the tandem rear Rockwells are sufficiently strong for the low (by today's standards) torque output of 1,250 lb-ft, even after the 17.23:1 First gear reduction in the tranny.