The vibzzz are killin me!

Another update to the vibration quest. I had the DS checked at another place and they said it was .030" out, I had them fix it and reinstalled, no change. I rotated the shaft 180*, no change. I had the car 4 wheel aligned and the drivers rear was out by 3/16". shimmed it, no change. The car drives better than it ever has- im just fighting the vibes. I replaced the rear poly trans mount, no change. I replaced the passenger side poly mount with stock, no change. When I drive it down the road at 60-70 and kick it to neutral the vibes go away. When i rev the engine in neutral there are no vibes, When I put the car on jack stands and run it at those speeds its there. I removed the exhaust clamps from the tips, removed the muffler supports and set the exhaust on blocks, no change. Added weight to one of the pipes, no change. I dial indicated the wheels, axles, brakes and driveshaft on the car at the trans it has .019", at the center of the DS-.005" and at the pinion, .013". To me the shaft is still out. I have the car on stands today and with everything turning the vibes are there, when i pull the DS out and run it in 3rd gear and rpm no vibes:banghead:. Technically after 3 DS (original, new one built, new one supposedely fixed) by the measurements it looks like I need another driveshaft. Im down to DS, trans, or rearend. I also have a vibration app for the Iphone and it picks it up with the shaft in you can see the cyclic vibrations and when the shaft is out it goes away.


Was the shaft balanced or all they did was try and remove the run out ?
It sounds like all they did was try and remove run out and dick around with it.

Do you have all 3 of the shafts that you have tried, and if so can you take pics of all 3 shafts so i can see them, especially where the weights are on the shaft.

When you throw it to neutral and it stops is also pointing to angles
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