The textbook shows the design of mechanisms and systems of cars and tractors, describes their structure and operation, presents kinematic diagrams of units and assemblies. Issues related to the classification and design of the clutch, its individual mechanisms are considered in detail. General information and requirements for transmissions, their classification are presented. invention describes design and principle of operation of axles and drives of driving wheels, control mechanisms and braking systems of automobiles and tractors, including anti-lock system of working braking mechanisms with hydraulic drive. General arrangement of tractors is presented. Issues related to control and working equipment of tractors are considered.