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Most years we install the bulletproof Dynatrac Axles in our Ultimate Adventure vehicle, but this year we wanted to try something different. We've never had any issues with the Dynatrac parts, we just thought a change of pace was due, and sticking to our Jeep/Dodge theme we chose a set of American Axle Manufacturing (AAM) axles that come in the new Dodge Power Wagon. The front axle is a 9 1/4-inch ring gear with 33-spline axleshafts and a selectable locking differential. In fact it's a bit smaller than a Dana 60 which has a 9 1/2-inch ring gear and 35-spline shafts, but it is also found in the 3/4- and 1-ton Dodge Ram's equipped with the Cummins engine.