Trying to track down a vibration, sometimes more like a growl, real seat of the pants thing between 50 and 70 mph. It was there prior to putting in a lucky8 rear shaft kit, did the front shaft a few years ago. checked the diff and xbox for oil, ok. I saw a reference here somewhere about the orientation of the yokes on the prop shafts as a possible cause? anything else? Tires are old and scalloped on the inner edges, but the vibe feels much more mechanical than tires.
