Well, I am joining the leaking FADA! 2021 only 24K miles. Very slight as the film was just around the drain plug. I did check the diff fluid level, and it needed 6 oz. Maybe underfilled from factory but who knows. I will make an appointment with my dealer. I have only brought the truck in for recalls but they do a nice job. Al Packer West in Palm beach FL. The fill port T50 is on there! I am wondering if the major problems came from the oil leaking out to the point the diff failed. Still have 1 more year on the powertrain warranty so let's see what they suggest. I saw some posts about oil return lines. Just smell the fluid. Gear oil has a very distinct smell compared to motor oil. Taste, well, let's not go there.
Tommy