I bought a 97 F-350 regular cab dually 5sp. I noticed the front drive shaft makes a clunking sound when in 4wd. I took it to a locally shop and they didn't really know what was wrong. I told them to check the ball in the double cardian joint and he said it was missing. Is there anywhere that makes drive shafts for these trucks or makes just the joints? What do I need to do to make it right?