I ripped off my Alt today. The bearings sounded like new(was told this was"rebuilt a few years ago". First thing, the voltage regulator, and brushes were removed. Here is what I found: For those of you playing the home game, the brush on the right fell out of the holder. Apparently someone replaced the brushes with the wrong style(the wire comes out the middle, instead of side). This caused the wire to be pinched, and short out. Just so happens, I bought a new set on one of my first big orders. Completely forgot about them! Also the wrong brushes were a hair to wide, and they were jammed. So not making a good contact, and royally messed up the graphite slip ring on the shaft. So the standard fight with a 3 jaw puller, and wobbly sockets commenced. With the help of the little 1950's Atlas lathe, the rings were straightened out. It all got slapped back together, and it charges fine now. The car is idling really odd, me thinks the Alt is working so hard to charge the weak battery.. Only Time will tell. Just remember -our idea of "rebuilt", and a shop that does several of these each day mean 2 different things. I guarantee you, they knew about these issues, but simply didn't bother to do anything about them. Why would they? Not like it's there car!