Did you inspect the U-joint? Even though everyone says they almost never go bad, mine did. If that's your problem, you will have to replace the driveshaft.
http://www.peachparts.com/shopforum/showthread.php?t=208875&highlight=u-joint
John

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Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI