Here are a few things I should have mention in the original post:
transmission fluid was changed in: 2/2001, 3/2003, 1/2009, 3/2011
complete cooling system flush (which included new Tstat & o-ring): 2/2002, 4/2006, 4/2010
power steering fluid was flushed with every TB job: 3/2003, 3/2007...