You beat me to it! :lol:You can at least confirm it's the dreaded vibe. Begin by reading this thread because it summarizes your problem and provides a few links that will save you some searching:
http://www.toyotanation.com/forum/showthread.php?t=338228&highlight=vibe
In my situation, yes. The vibe was only present for a few hundred miles. Since then my truck has been smooth as glass! But just as a disclaimer: Individual results may vary!i was thinking about the dif drop. so you said it only lasted a few hundred miles?