They are the special parts found in fashionable synchromesh gearboxes. By maintaining the leading shaft, lay shaft, and clutch shaft at precisely the same velocity, they aid clean gear shifting. They don’t have to move more than the shaft with the gears to change. Torque converter does the same https://gearbox83793.elbloglibre.com/33767660/the-definitive-guide-to-gearbox