Okay Glen, I have to ask, did they put HD Syn in all three holes? That noise could be one of those "-they all do it...(because thin HD Syn3 may make gear in the tranny and primary "rattle a bit" in the long term) JMO. Plus, I don't care to support CITGO (they are the contracted OEM of HD oils...) which is keeping Hugo Chavez flush with US cash for all his USA bashing.