This master’s degree Thesis deals with the optimization of the solid body of a Gear in an eAxle transmission, using an automated process based on Finite Element Analysis. This activity was performed at Dumarey Automotive Italia S.p.A. The company has already developed such an optimization process for this component, using commercial tools. Its goal is to achieve a mass reduction, without penalizing the structural strength. Due to the cost of the commercial tools and the high number of cases to be simulated, such an optimization procedure represents a significant financial burden. The aim of this Thesis is the development an equivalent process using open-source tools, as a valid alternative.