The document discusses the impact of misalignments on root stresses of hypoid gear sets through finite element analysis. It begins with introductions to gears, hypoid gears, and finite element analysis. It then describes the modeling of a hypoid gear set with both perfect alignment and misalignment in ProEngineer. Structural analysis was performed in Solidworks to analyze stresses, displacement, and strain. Results showed stresses doubled with misalignment. Aluminum alloy materials had lower stresses than steel. Misalignments increase stresses and can lead to early fatigue failure. Perfectly aligned hypoid gears perform more efficiently with less mechanical losses and longer lifetimes.