Blade deformation and fragmentation: If subjected to abrupt loading or extreme heating from the converter, pump and/or turbine blades can be deformed, divided from their hubs and/or annular rings, or might split up into fragments. Nevertheless, Like all mechanical element, torque converters can dress in out or malfunction with time. https://damienmgtgr.blogocial.com/torque-converter-clutch-an-overview-69745232