Voith Turbo has created literature to help calculate torsional vibrations of drives with hydrodynamic couplings. The publication can be downloaded from Voith Turbo's webste at: www.voithturbo.com/fluid-coplings_literature. The need for such a publication arose because, while the positive characteristic of fluid couplings receive a great deal of attention, other beneficial features receive less. For instance, the dampening of torsional vibrations in the driveline are often overlooked. This is a very important features as it reduces the load on the drive components andincreases their service life.