A power actuator for automotive door latches. The actuator includes an electric motor mounted in a housing. A worm is operatively coupled to the motor for driving rotation of the worm about an axis. A worm gear, which meshes with the worm, is mounted to a tubular mount in the housing for rotation about an axis substantially orthogonal to the worm axis. A cam mounted to the worm gear engages the lever of a latch. An integral camshaft depends from the cam and extends into a central aperture on the worm gear, making the rotation axis of the two coincident. The distal end of the camshaft includes at least one resilient finger received through the aperture and in abutting contact with an opposing surface of the gear to preclude axial withdrawal of the camshaft from the wheel aperture. The power actuator uses a reduced number of components.