Well, I finally figured it out. I was driving down the interstate the other day and it started vibrating bad enough that the airbag light on my dash came on. I popped it in neutral, and shut the engine off, and the vibration didn't go away. It felt like it was coming from the right front, and occasionally it would pull to the right slightly. At lower speeds it stopped. The right hub was a little warmer than the other so that's what I tore into when I got home. I put Warn lock outs on a couple of years ago, and the right one had water in it. It had corroded enough that the axle shaft was chattering in the brass bushing in the center of the lockout. I took it all apart, cleaned it and regreased it, repacked the wheel bearings while I had it apart (they were fine but it seemed like the thing to do while I had it apart), and the noise is now gone. I ordered a service kit for the hubs and will rebuild when I get it. Just thought I'd follow up in case someone else encounters the same problem. Luckily it didn't strand me or cost a lot of money!!

Winkel