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Driveshaft Caliper Measurement

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The axleshafts are the same length between the 10- and 14-bolt axles if overall axle assembly is the same, but the spline count and diameter are different. The early 28-spline 10-bolt (right) measures 1.20 inches, as opposed to the 14-bolt shaft, which is 1.37 inches in diameter. The higher 33 spline count of the 14-bolt also adds strength and durability.