12.7 Series 60- Issues after rebuild

That's it in a pic. The welded ends that hold the u-joints need to be lined up the same. The yoke on splines needs to be rotated 180 degrees opposed to those welded ends on the 2 drive shafts between the trans and front diff.

 

I'm not saying that's all of your problem but it could be some of it. Like was said by ProffessionalNoticer it'll only have a vibration if you're driving it when it's out of phase.

Like others mentioned if it's a rough idle vibration while you're parked maybe having someone that knows what the F they're doing to adjust your overhead might fix that. That'll cost you about 4 hours of labor give or take.

Visually checking driveline phase cost you zero. And may or may not cost you some labor to correct.

 

Just saying if you're not moving than whatever causing that particular issue would not be driveline related.

 

You can tell if they’re good. You can easily see them. Also like the others, when worn out, the bottom washer will spin, bolt will be loose, can’t tighten the nut because of the bushings. Your Trucks going to be smooth now. No more vibration. Hopefully that’s also the noise you’ve been hearing.

 

Who did you have build it?

 

All that vibration done shook your crown off