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Old 04-15-2012, 09:12 PM   #12
bucketobolts
 
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Drives: 2010 2SS
Join Date: Jan 2011
Location: Salisbury, NC
Posts: 149
What your describing is the clutch type posi unit in the rear. Nothing is catastrophically wrong with your rear end. You can add a bottle of posi additive GM # 88900330, costs about $10 and I bet your noise will subside.
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