What's is this noise video

[Vegasmarc21]

What is this ratcheting sound....a video of 2011 Tahoe slip yoke and transfer case. Anyone and everyone pls help!!! Please skip to 4:52 Mark and 7:09 Mark

 

[Big Mama]

Sounds like slip yoke but is louder have you removed the rear cover? It could be as simple as loose bolts to other brackets based on the pinging sound. Get under it and start shaking stuff around e-brake is common. I’m not sure if Keep driving with that noise.