In this final project, a device for determining asynchrony of the cardan joint was constructed. To facilitate the task, the principle of methodological development of product was used, which includes the list of requirements and wishes, functional structure, problem abstraction, morphological box, elaboration and dimensioning the concept solution, and also technical and economical evaluation. After the defined concept solution, a 3D model was created in program package Autodesk Inventor with its workshop drawings. In the program, a kinematic simulation was performed for the characteristic cardan shaft angles, and the speeds of the input shaft were recorded in relation to the speed of the output shaft for each angle. The theoretical rotational speed of the output shaft in relation to the input shaft was also calculated using mathematical formulas for the purpose of comparing results with the results from the kinematic analysis. The results for the characteristic “Z” and “W” positions of the cardan shaft were also analyzed in order to demonstrate the equality of the input and output speeds in that case.