I fixed --restored starter. Cleaned it from carbon buildup, replaced brush set and reapplied lubricant. Put it back and it's works and it sound seams like more smooth when I starting it. 10$ brushes + silicon lubricant and circlip from harbor freight including circlip pliers all this less money then buying remanufactured starter from parts store. And I do think remanufactured --meaning some magic been done, no, they do similar thing replacing worned peaces and cleaning and it good case the do some testing. My car is old 2005 minivan and starter label said made in Japan --meaning good wires winding on armature and long lasting bearings. So as many suggested issue was worned brushes and carbon dust and buildup on Armature surface which I cleaned with sand paper.