Looks like I might know where my ATF leak is coming from. Looks like the transfer case input shaft seal is allowing fluid from the transmission to migrate into the transfer case. This is the FILL plug. Truck is pretty level too - actually sitting a bit lower in the FRONT than normal (wheels off on jack stands) and as soon as I removed the fill plug - fluid started coming out and it was NASTY.

Owner caption May 2019 · Photo 117 of 269