Hot weather/engine + stationary idle = loud moan when pulling away and turning. Has anyone nailed the cause and fix?

this was on my list when I was in for my 75k service last month. Noise has been worse than ever the last couple of weeks.

BTW, the noise from the trunk is more of an irritating whine that's coming from my ex mother-in-law, not gramma. ;)

The link to the rs6.com forum no longer works, but this post may tell you all you need to know.<ul><li><a href="http://forums.audiworld.com/rs6/msgs/34888.phtml">http://forums.audiworld.com/rs6/msgs/34888.phtml</a</li></ul>