Abstract: An electromagnetic brake for an input shaft of a vehicle transmission is disclosed. The brake includes an armature separated from an electromagnetic coil pole face by a controlled air gap. A spring release feature ensures precise armature disengagement when the brake is deactivated. A wear compensation feature maintains uniformity of the air gap.

Abstract: A rotational coupling assembly for transmitting torque between a driving member and a driven member includes a torsionally compliant component having first and second rotary torque transmitting members rotatable relative to one another throughout a first angular distance, and a compliant member that provides a resilient driving connection between the first and second rotary torque transmitting members within the first angular distance. A torque overload protection component is secured for rotation with the driving member and is rotatable relative to the second rotary torque transmitting member throughout a second angular distance. The overload protection component includes a rotation limiting connector adapted to selectively establish a driving connection between the overload protection component and the second rotary torque transmitting member to limit the amount of torque transmitted through the torsionally compliant component.