||04-30-2012 08:12 AM
What dealership did you take it to? Some of the Toyota dealerships up here are 'less qualified' than others. There's on in Acton that has a very good reputation.
When you get the vibration, is it just when you slowly start to roll off the line? Does it happen only under hard acceleration or does it vibrate when softly accelerating as well? Does it go away at speed? Any stray noises?
I doubt it's your drive shaft that's defective... It's most likely a drive line component, either a bad u-joint, carrier bearing or even a worn out leaf pack causing axle wrap but I doubt the drive shaft is the problem for a slow speed vibration.