Loud noise when in reverse and turning in the morning only. 2021 Yukon.

[SandboxSlayer]

I just had the rear fluid differential fluid replaced at the dealership. They had stated that friction noise was occurring. I didn't have an issue with that since I have about 85K miles on it and I have no idea if that was done before the 72k miles it had when I bought it. It had made that noise once before I had that fluid changed, but since then it has made it every morning. It doesn't make that noise nor feel like I hit a pothole at any other point in the day. It only does so in the morning. The dealership wants $3500 to replace the whole differential now. The sound comes from the front right side and it feels like hitting a pothole only after I start to turn the wheels out of the driveway. Has anyone else had this issue? I have a Yukon SLT 5.3L V8, RWD, if that matters.

 

[Fless]

Describe your "friction noise;" does it sound like scraping, or like a pop or snap?

When it makes the noise from the front right, is that the friction noise you're describing, or a different one? When it happens is the Yukon moving, or is it while it's stationary with the tires turning?

 

[SandboxSlayer]

Describe your "friction noise;" does it sound like scraping, or like a pop or snap?

When it makes the noise from the front right, is that the friction noise you're describing, or a different one? When it happens is the Yukon moving, or is it while it's stationary with the tires turning?

Honestly, I wouldn't describe the noise like those or even grinding. maybe someone like sliding your hand over paper. It's hard to describe. It only make the noise when reversing and only in the morning after it rested over night. The dealership said there was a rock or something stuck in my rotor...Maybe that is where that noise is coming from. the loud clunking noise just happens once then it won't make it again that day. My first thought was maybe the Transmission, but that seems like it would be happening every time there is a shift from reverse to drive. This all happens when backing out of the drive way after about 15 feet and the wheels are turned to the right so that I can get on the street.
Thank you for your questions and helping me figure this out!