I drove up to my girlfriend's parent's place for Christmas. Last Friday I took my truck in for an alignment before this trip. I was called and told my driver's side hub asembly as shot and that was my droning noise heard while making right turns, but not lefts. Before this I had also replaced my u-joints, both on my rear shaft and the front joint on the superlift front shaft. I had the asembly replaced and thought all was fine. However, on my drive up to girlfriend's parents' place I had a strong, oscillating vibration from 78mph and above, slight around 76-77, and smooth drive at 75. The vibration would last for about 5-6 seconds, stop for 1-2 seconds, and then repeat 5-6 seconds. I'm completely at a loss of what this could be. I also still have a clunk, though intermittent (sometimes I get it and sometimes I don't), when coming to stops. I'm thinking this is possibly the rear pinion bearing and I'm wondering if this would cause an strong oscillating vibration? Other option is maybe an unbalanced tire? I unfortunately can't check at this moment, but I'm curious on opinions of what could be going on. What's really frustatring is it never fails, everytime I go to my girlfriend's parents' I've got some sort of semi-major repair to do. The truck is honestly pissing me off.