Because of its precise controllability. As a result, the damper is usually intended on a smaller scale, allowing for a more room-conserving design and style of the converter in general. It is a attribute beyond what a simple fluid coupling provides, which may match rotational speed but won't multiply torque. https://torque-converter-clutch41889.blogdigy.com/5-tips-about-torque-converter-clutch-you-can-use-today-51321851