The object of this article is to propose a simplemethod to reduce the transmission error (T.E.) for a given spur
gear set, at the nominal torque, only by means of the profile modification parameters. Iterative simulations
with advanced software, are needed. A hybrid method has been used, combining the Finite Element
technique with semianalytical solutions. A 2D analysis is thought to be adequate for this kind of work, in fact,
this software requires both little time for model definition and simulations, with a very high precision of the
results.