Vibration in front end

[BigDawg99]

ive had this vibration in the front end of my truck since i got the truck in december..i had both Wheel Bearings Replaced and the noise is still there..i took it to a friends garage and we put it on the hoist and started the truck and had my wife put it in Drive..as soon as she hit 40kms...you can see the front differential just vibrating..we put more differential fluid in there to see if it would make a difference but it didnt...would anyone here know what is going on with my truck..

02 Yukon denali AWD with 303,000 kms on it...

 

[07Burb]

Could be an out of balance driveshaft...

 

[BigDawg99]

thanks man..thats what i was kinda leaning too aswell...Will have to get that checked out

 

[07Burb]

Yeah...kind of a shot in the dark but makes sense in my head let us know what they find.

 

[Physh1]

The wheels/tires are properly balanced correct?