The collection published the materials of the NAMI studies of the load of the transmission of the car as a whole, its units and parts. The first article describes the main provisions of the methodology for studying the load of parts of the transmission of the car in operating conditions with the use of mathematical statistics methods . In the second - the technique developed above is illustrated by examples of the study of the load of the transmission parts of the ZIL-157K . The third article is devoted to the study of cardan transmission; experimentally determined maximum bending moments; considered the most profitable schemes of cardan transmissions. >In the fourth article are theoretically calculated for a number of trans-*missions of domestic cars torsional-vibration systems. In the fifth - the data of experimental studies of rotational oscillations in the transmission of the UAZ car with the help of a set of magnetic recording, a statistical analyzer of the swing . are given. Its spectrometer of infraniznyh frequencies. In the sixth - the experimental data on the towing operation and the angle of towing of new clutches of the ZIL-130 car are considered, connections between road andstand clutch tests are established. The seventh article is devoted to the results of the harmonic analysis of the torsional oscillations of the transmissions of cars; it considers the influence of the oscillations of the cardan transmission on the twisting oscillations in the transmission. In the eighth article, the process of synchronization in gear boxes having a pneumatic switching mechanism is investigated; the conclusion of the main theoretical dependencies of the synchronization process is given. In the ninth, the issue of unlocking the synchronizer transmission . is being investigated. In the eighth and ninth articles, the international system of SI units . is adopted for measurements.