Join Date: Aug 1999
Location: Ontario, Canada
The end play in the axle shaft is normal,
it sounds like the vibration you have is running gear and not engine or tranni, as it is still there when you shut the engine off.
To check axle bearings, they make more noise than vibration drive the car at a steady speed, turn right then left, like the Nascar guys when they warm and clean the tires,
if there is a problem with the axle or wheel bearings, the noise will be less when you turn one way and louder when you turn the other way.
I would look at the brake drums and rotors, are they rusted or is a weight missing from the drum, It sounds like you will find your vibration at the wheels, if you feel the vibration more in the seat thgen look at the back wheels, if the vibration is strong in the steering wheel then look at the front wheels,
You may also want to do a search on old topics, just search "VIBRATION", there are lots of posts on this topic.