Alternator question

samedi 2 août 2014

I recently put a new alternator on my CJ. it has a 258 which runs well. I replaced the alternator because the old one because it developed a high pitch squeal. The tone of the squeal changes during acceleration and idle. It only develops after the motor is warmed up.



So I replaced the one that was making noise with another and about 50 miles into driving with the new one, it developed the same noise. It charges the battery fine but i'm getting pretty sick of the noise.



The belt is tight and the belts are new, so that is eliminated.



I bought the alternator from autozone, so its a duralast.



Any ideas?




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