whats this noise? (video)

[Y2KpewterZ]

Noise has been coming and going. I replaced the CV axle.. thinking that was the problem. Apparently not as the sound is still there. Ive noticed the noise quiets down, almost silent after driving for a while.. maybe 5-10 miles. It almost sounds like a jack hammer in the distance. The video is of me pulling out of a parking lot. Sorry, dont know how to embed videos.

A buddy of mine said he believes its a "ball style joint" behind the u-joint yoke on the transfercase side.. so im assuming that is what's underneath the rubber boot on the front output side of the transfercase.. its on an OBS Z71 with Autotrac.

Vid: https://www.facebook.com/photo.php?v=773941165967767&l=5877455817716733671

 

[livingez_123]

besides wind noise and what sounds like a slight rod knock, I don't hear anything.

 

[Y2KpewterZ]

besides wind noise and what sounds like a slight rod knock, I don't hear anything.

Yes, thank you for this most valuable comment... as clearly it is not a rod knock.

 

[OHSIXX]

definitely rotational in nature as it seemed to change with speed.....might still be a rod knock though lol

Anyway to get it on a lift and try to pinpoint the area better?