Ok, folks. Got it fixed! The answer is... the front driveshaft and the Cardon joint.
Every thing was done while sitting on jack stands.
Before that i sprayed down the 4wd shift linkage and got it moving good. (4 low was difficult to engage) drove it in 4 low for a few minutes. Switch to 4 hi, did the same thing. Then 2wd. Still there. I bought a set of manual locking hubs and put them on. Vibration still there.
Tried greasing that Cardon joint and it was hard to pump grease in. I heated it some with a torch and it took grease easily. Drove it in 4low and I could feel it smooth out. Back in 2wd and it was mostly gone. Rotated front shaft 180* and it was back. So, I did the heating, grease, drive in 4wd, 2wd a few times and the ramcharger stopped the shakes.
When I actually took it off the jack stands and drove on the road, it felt great with the new hubs, tires and vibrations gone. I think it needs to be driven more often in 4wd to keep that joint from binding.
I really appreciate all your help with figuring out the vibration. Hell, I might even get better mileage with the hubs and tires.
Thanks, Paul
