Well I did some coasting downhill with the driveshaft removed and still had the vibration. I also lifted each wheel off the ground and checked for play in/out and tried twisting the tires and felt no abnormal play and fronts spin fine. I dont thing I have a bad wheel bearing but I think i'm gonna try and support the rear on jackstands and run it up to speed and see what happens. Anyone got any more ideas of things I can look at? Shocks look original but seem to me that they are still good. I also plan on supporting the front end up in the air and checking the ball joints out good.

 

Have you had the wheels checked to see if they are bent?

 

When I had it raised I spun the fronts and they ran true(No wobble). I was planning on raising the rear so I can look at them when running it. I also got new tires a couple weeks ago I'm thinking if a rim was bent they would have seen it when balancing the tires?

 

So I take it the vibration was evident before and after the tires?

 

Yes and it's more like it's bouncing.

 

Is your steering wheel shaking?

I know if it were mine, I'd go have the wheels checked on a machine.

 

not the steering wheel. it feels like the whole truck is moving.

 

There's a little trick I remembered my friends Dad doing on his old Datsun/Nissan truck back in the day. He jacked up the rear end of the truck and supported both sides with jack stands. He then went a stacked up a combination of wood pieces (I imagine about anything could work here) and placed them under each tire individually. He then spun each tire. What he found is that one of the rims mounting holes was wallowed out just enough, and mounted in such a way that it was creating a slight "goose egg" effect. The tire, when spun, would run into the wood, ever so slightly.