Compound ujoint angle vibration?

You want your rear end pinion to be parallel to output shaft of trans. Is driveshaft straight and true?

 

You want your rear end pinion to be parallel to output shaft of trans. Is driveshaft straight and true?

 

They may have put the driveshaft back in "out of phase". It needs to go back in the same way it came out.

 

Did you catch the one from? the mustang avatar guy? He has a some good information especilly on late model stuff. Knock the axles out, lock the power divider, and run it. If the problem is there it's a shaft, yoke, angle, bearing problem. If not it is a tire drum, rim, etc problem.
I had never heard of that before, doubt it is 100%, has worked for him and I thank I would try it in your case.
Slant is also correct: A quarter turn out of phase is often over looked. I did my best to explain that to someone else about a year ago. If you did no see that maybe check in the Pet. section.

 

Did you catch the one from? the mustang avatar guy? He has a some good information especilly on late model stuff. Knock the axles out, lock the power divider, and run it. If the problem is there it's a shaft, yoke, angle, bearing problem. If not it is a tire drum, rim, etc problem.
I had never heard of that before, doubt it is 100%, has worked for him and I thank I would try it in your case.
Slant is also correct: A quarter turn out of phase is often over looked. I did my best to explain that to someone else about a year ago. If you did not see that maybe check in the Peterbilt section.

 

Excuse my poor explaination of his post. Remove the axle shaft from each hub, 4 of them, and run the truck in high gear, PD locked and you are not going anywhere. Sounds like you need a shop to do that for you, which is OK and only a suggestion.