Loud Squeal at slow speeds

Hi, I have a 2021 Ram 1500 4x4 with the 5.7. I have been hearing a very loud squeal at slower speeds, typically under 30mph. My tire hum taker over around 30mph so I’m not sure if it’s still there or not lol. I’m not totally where it comes from but braking doesn’t stop the sound. I found where oil sprayed the underside of my truck right where the driveshaft connects to the transfer case. Please see pictures and video I’ve included. Also, I could not feel fluid in the fill hole on t-case. Freakin Dodge uses/recommends Mobilfluid LT which isn’t readily available anywhere ugh. Any help would be greatly appreciated!