In a vehicle differential unit according to an embodiment of the invention, a planetary carrier that is a rotatable member that rotatably supports planetary gears is formed of cylindrical members that are unable to rotate relative to each other on the rotational axis of a pair of output shafts. The clock preferably has an oscillator for generating an oscillating waveform signal at a preselected frequency and a frequency divider responsive to the oscillator for dividing the frequency of the oscillating waveform signal. A local data structure is maintained within the switching element wherein the local data structure contains data used by the switching element in its operation in the communications system. The force transfer device serves as an integral part of a level indicator for both viscous fluids and lower viscosity liquids. After the user rotates a jogshuttle knob, the list rolls down a low rate.