04 630 shaking! Help!

is it possible you have a balance weight that was some where along the drive line that corroded and came off?

 

besides checking for u joint problems on drive line.remove plugs on both rear ends and check for excessive metal debris.good luck.

 

take driveshaft round-out we see that very often, if round out past 0,020 better way is to change,

 

Push your driveshaft up by the diffs and see if there is any play. if it moves at all your diff may need a little tightening up or if its real bad then replacing. check the steady bearing for play as well. i just had both my trucks have a bad wobble. heavier at low speeds. one needed new diffs and one needed a steady bearing and the spines were wore out on the inter axle driveshaft.

 

I had same problem w/2012 780 D-13. Went thru all the same checks as you as well as above suggestions. Turned out to be the injectors (common on this engine). They found two broken injectors and replaced all six. Problem gone!

 

I would check the king pin and bearings, had that similar shaking problem with our 670 and the bearings were toast