out of the gear compartment and an upper end extending freely through the hollow input shaft to a point proximate to the electronic rotational position sensor a gear assembly is supported within the gear compartment for translating rotation of the input shaft to the output shaft a sensed object is disposed on the upper end of the output shaft opposed to the speed sensor application_number US 201213551996 A description reference will be made to fig1 and 2 in which fig1 is an exploded isometric view of an actuator assembly 10 and fig2 is an axial cross section of actuator assembly 10 actuator assembly 10 generally includes a gear assembly 12 a motor assembly 14 and a circuit board assembly 16 all located within a housing 18 motor assembly 14 may generically be referred to as a rotating electric machine housing 18 extends along axis a and includes a gear compartment 20 for receiving gear assembly 12 a motor compartment 22 for receiving motor assembly 14 and a circuit board compartment 24 for receiving circuit board assembly 16 gear compartment 20 may be separated from motor compartment 22 by a bulkhead 26 having a bulkhead aperture 28 extending therethrough and centered about axis a bulkhead 26 generally defines a bottom wall of motor compartment 22 bulkhead 26 may contain features for example a plurality of grooves 30 that concentrically surround bulkhead aperture 28 on the side of bulkhead 26 that faces.