The term "power shift transaxle serial number" refers to a unique identification number assigned to a type of automotive transmission used in many modern vehicles. Synonyms for this term may include "transmission serial number," "gearbox code," or "transaxle identification code." These designations all serve the same purpose, which is to identify the specific type and configuration of a vehicle's transmission system. By referencing the power shift transaxle serial number, mechanics, and automotive professionals can quickly determine the correct replacement parts and maintenance activities necessary to ensure the continued smooth operation of a vehicle's powertrain.