This is not another ABS test question

2020 TRD Sport 4x4 with 73k miles. All stock other than barely taller tires (275/60/20 AT's)

So I know what the sound is for the ABS test when the truck first starts moving after sitting. No I'm not describing that.

Past week or so, when starting up and leaving in the morning, I've noticed a click sound when I first get moving. Again, separate from the ABS test. Well this morning i rolled down the window to listen and the sound is very similar to a stick breaking and sounds like it's coming from the rear. I park on a concrete driveway so I know I'm not driving over anything. It's also consistent every morning. Ambient temps have been in 40's-60's and I always back into my driveway so when I'm leaving, I am in drive moving forward. Maybe 2-3 mph at best.

I haven't had time to get underneath and look around but normal driving, everything else is normal.

Any ideas what to look for?

0W-20 oil at 5k OCI. Just for shits and giggles.

 

Friendly bump

Noticed this morning that it made the loud click/snap sound when I first put it into Drive. No more sounds after that other than the ABS check. No sounds during normal driving and it seems to only do it in the mornings. Truck sat all day at work yesterday (8-5) and no sounds. Then sat all night from 6p-7a and thats when it did it. I was going to try and get a video but I put the truck in gear before I started to record.

Making me wonder if it's a U-joint possibly? I also ruled out that my calipers are not sticking.