Abstract: An assembly for a variable cam timing phaser includes a rotor extending circumferentially about an axis. The rotor has a rotor interior surface defining a bore completely therethrough and configured to receive a control valve, has a surface extending radially away from the axis and perpendicular to the rotor interior surface, and has a retention tab integral with the surface and extending axially away from the surface. The assembly further has a trigger plate coupled to the rotor, with the trigger plate defining a retention channel completely therethrough. The retention tab of the rotor is disposed in the retention channel of the trigger plate.