Driveshafts must be precisely balanced and weighted because they rotate at very high speeds and experience high torque forces. Inferior driveshafts can cause problems that affect the drivability of the vehicle. Determining the torque and rotation properties of driveshafts is critical to determine the performance and quality of these safety critical components.
Shock absorbers used in an automotive suspension assembly can experience impact damage. In real life conditions, these dampers are exposed to multiple impacts and are expected to make vibrations as smooth as possible (e.g. speed bumps).