The "rurrrr rurrr rurrr" sound coming from the back of my car turned out to be the pinion and/or carrier bearings. The local Pontiac dealership replaced 'em under warranty. <img src="http://www.spartanburgracing.com/cgi-bin/ikonboard/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

'> No more stupid noise (for now). <img src="http://www.spartanburgracing.com/cgi-bin/ikonboard/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>
Next on the agenda: Z06 clutch assembly. <img src="http://www.spartanburgracing.com/cgi-bin/ikonboard/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

'>
Rob