A motor (10) for a vehicle includes a stator assembly (14) and a rotor
assembly (16). Bearing structure (20, 22) support the rotor assembly to
permit rotation of the rotor assembly with respect to the stator
assembly. A shaft (30) is threadedly engaged with the rotor assembly and
is constructed and arranged such that rotation of the rotor assembly
causes linear movement of the shaft. A perfluoropolyether (PFPE) based
lubricant (38), having an thermal functionality upper temperature limit
of over +200.degree. C., lubricates at least the bearing structure.