2009 w900l vibration

I was referring to the front steering tires.

 

Your power divider sitting 5 degree up seems like a lot. The most I've seen is 1 or 2 degrees.
I would try to get that pinion down around 2 degrees and try that. Also lift your hanger bearing the shaft is at 2 degrees not 4

 

If you post last six of VIN I can give you angles from factory. The whole goal is to get working angles within a degree of each other. Multi shaft take a different approach. You usually put 1.5 degrees in first working angle @ tranny, then cancel out the angles in second shaft. @swaan suggestions get these numbers very close to cancelling out dead on.

 

After more thinking.

Set your hanger shaft at 3 degrees down. So same as your trans yolk.
This would involve raising the steady bearing a bit.

Now set your input on power divider at 3 degrees up. Your 5 degrees is quite high. Aim for 2-3.

 

I've found that sometimes you can't get a 1 1/2 degree working angle on trans yolk on some trucks . Reason is it can screw you on the rear angles.

His truck is one those wierd ones where you have to have almost 0 working angle at trans to make the rest happy...