Arclight

Is this new info? http://vitalysmobileautodiagnostics.com/archives/6392

You need to read the entire thread and learn what has been tried to solve the vibration problem. Warming your truck is not the solution.

Correct and they have the unknowing public to test the defective vehicles.

Yep! Test the driveline. Do not replace it with one from another infected truck.

I was going to purchase a new Silverado/Sierra until I found this thread. I hope someone will take their shaft to a professional drive-line shop and post the results. PS: What is the best Ford F150 Discussion Board? Address?