I am getting a vibration from speeds 30mph and everything above that. That vibration is light and not in the steering. Not bad just enough to annoy you. Engine speed, load doesn't seem to make a difference. I replaced my m/t tires with a/t which is when I noticed it. I think the m/t tires may have just been hiding it. I took the new tires to be reblanced but it feels the same. Front wheel bearings are also new and have no play. Front drive shaft was replaced. Does this even sound like a driveline problem? When I crawl under the ujoints don't have any noticeable play. There is a tiny amount of play in the t-case output shaft not even measureable but you can see it move slightly if you really try.