I had the same problem on my '57 starter 2 years ago.. I try to short-wired the solenoid w/o result... I remove the starter and wired it , nothing happened ! I remove the brush, clean the rotor, etc.., no result. I let it fall from 1 foot on the ground and .. after wiring again, it worked !! The next day (before i re-installed it..) it didn't work again. After another fall, ok !! Seems that ther's something wrong in the brush springs or posts. i put another good working starter ..and since this time, it's always in the "waiting for repair" shelf -- Philippe COURANT (Pau, France)- Webmaster des sites ACCF et C-I-F Imperial 1957 Crown convertible Buick 1996 Roadmaster wagon - American Car Club de France (ACCF) : http://www.accf.com - Chrysler Imperial France (C-I-F) : http://www.ifrance.com/c-i-f - Cadillac " Standard of Excellence " : http://www.ifrance.com/accf-cad - SportsCars : http://www.ifrance.com/accf-sprtcar