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Bearing press fits have a wide range of application in ground vehicles and are typically governed by longstanding rules of thumb for designs that conform to past successful design geometries and practice. However, in unusual applications such as a gear box designed to also bear external loads, the combined stress states require finite element analysis (FEA) that accounts for the press fit, the bearing loads due to torque transmission, and the external loading. Therefore accurate prediction of press fit stress states are required to construct complete solutions to gear box fatigue life prediction and in particular to predict mean stress states. Current FEA tools provide a variety of analysis methods with which to approach the problem of press fit mechanics.