Why do I have to keep replacing my alternator? Van has 127,000 miles and alterna on 2006 Chrysler Town & Country

nator has been replaced 3 times. I keep getting a loud noise coming from alternator when engine is running. After each replacement the noise goes away but eventually comes back.

Asked by for the 2006 Chrysler Town & Country
1 answer
WHERE ARE YOU GETTING YOUR PARTS? WHEN ALT. IS REMOVED CAN A PROBLEM BE FOUND WITH IT? HOW LONG DOES THE REPLACMENT LAST? I THINK IT MAY BE SOMETHING ELSE. IF YOU JUST TOOK THE BELT OFF THEN PUT IT BACK ON WONDER IF NOISE STOPS?
IF SO MAY BE TENSINOR OR OTHER DRIVEN COMPONETS. JUST A THOUGHT. ANY ODD NOISE JUST AFTER ENGINE SHUT OFF LIKE SOMETHING IS STILL RUNNING,AS ALT.PULLEY IS CLUTCHED AND THEY DO GIVE PROBLEMS.