This work deals with the development and construction of a 90 ° deflection gearbox. This is intended to replace a joint which represents the connecting element between the steering wheel shaft and the steering gear in the racing car of the Os.Car.Racing team, on which the new deflection gearing is to be installed. An important concern in the project was to develop a simple and, above all, compact reversing gearbox. Another aspect was to create an uncomplicated connection to the steering system of my project partner Patrick Pilz. In the course of my work, a 90 ° bevel gearbox was developed, which corresponds to the basic conditions of the form student rule catalog. It is connected to the steering system with a simple threaded bolt connection at the input side, with the steering wheel recess, and at the output side with a double-threaded bolt connection.