I have a 2000 durango with 102,000 miles on it.  When accelerating slowly a
squeaking noise is heard, when foot off pedal, sound goes away.  At freeway
speeds, the noise also a noise that seems to be a low tone (bass) fast
repetion viberation when the pedal is pressed down and it goes away when
pedal is released.  Sounds like noise from deep tread on tires/road noise,
but is consistent no mattter the pavement.  Occurs at speeds greater than
45mph.

Dealership did a test drive with me and said he thought was the drive shaft.
This does not make sense to me, could he be right?

Mr.