TransEngineer - thanks for this information. This should probably be a sticky on the board. I was under the impression that my converter wasn't locking up properly and was hampering fuel economy. Glad to hear it's not a durability or fuel economy issue, because I can reliably duplicate the warble. Thanks for the good info.
That's a good idea. Maybe a mod should talk to him privately and ask if he'd be up for having a separate thread(stickied) dedicated to answering questions, or giving explanations for common problems or just for informational purposes. If he's willing to do so of course.