Fluid flywheel or Hydraulic coupling: An alternative to clutch, uses fluid for transmitting the torque. It is also called hydraulic coupling. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostFinal drive ratios Next PostFlywheel