The yoke leak evidently is leaking through a bad seal inside the yoke assembly, and out the back end at the u-joint. The shop steward was saying that Nissan's official fix for this is to replace the driveline, at $2600 bucks. He was saying though that there were several other options out in the market that were not "Nissan-approved", but were available and evidently worked. I'm doing the research now.
