Respectfully, to you gentleman suggesting he rebuild his own; not knowing his skill level nor what the problem is, your advice might not be helpful. I consider myself a pretty good amateur mechanic, and have replaced brushes, bushings and Bendix units. However, if I ran into a bad armature or field coil, I'd be lost. I've scanned the threads suggested, and when I got to the one that referenced the use of a lathe, I decided I would be in over my head. Marco, if you have access to the proper tools and the skill to do whatever needs to be done, by all means, have at it. Otherwise, a good automotive electrical shop is your best bet.