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Old 02-01-2008, 08:47 PM   #5
edpontiac91
 
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Join Date: Aug 2007
Location: Piscataway, N.J.
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I would guess that if you have a POSI rear, that the clunking sound might be the clutches in the rear. Usually when making a turn, the clutches are trying to grab more on one side and they chatter. You might want to put in a GM Additive that is made for this. It used to be whale oil, but they have since changed the formula, but it does work.
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