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Ford 1025 1050 Axle Tips Spline Length

Here you can clearly see the difference in spline length between the long-pinion 2nd generation 10.25-inch Sterling (left) and the short-pinion 1st generation 10.25-inch Sterling. The splines differ by about 1/2 inch, and the shorter pinion was known to wobble and cause failure of the ring-and-pinion.
Ford 10.25 & 10.50-Inch Axle Tips - Axle Examination

 Here you can clearly see the difference in spline length between the long-pinion 2nd generation 10.25-inch Sterling (left) and the short-pinion 1st generation 10.25-inch Sterling. The splines differ by about 1/2 inch, and the shorter pinion was known to wobble and cause failure of the ring-and-pinion.  View Related Article

 

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