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Pinion Shaft

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We are impressed with Jeep's design of the JK's new axles. The Rubicon version of the JK's ring-and-pinion is as beefy as the Dana 60. The JK pinion shaft (center) measures in at 1.312 inches on the outer bearing race and 1.625 inches on the inner bearing race. The Dana 60 pinion shaft measures in at 1.250 inches on the outer bearing race and 1.625 inches on the inner bearing race. Though pinions usually fail at the teeth, the larger girth of the shaft certainly lends a higher degree of overall strength and dependability under harsh conditions. Pictured above are a Dana 60 (5.11) (left), JK 44 (4.88) (center), and a TJ Dana 44 (right).

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