In the process of LS swapping my disco. I removed my transmission and TC because I knew the original TC was on the way out when I bought it. This is the fill plug from my "New" TC. Is the general opinion to run this or should I just rebuild while the TC is out of the Disco. Oil did not smelled burned and still had slight red hue to it when I drained it from the "New" TC. Old TC oil was black and burned, but nowhere near this much material on the plug. This is not my first LS swap, but I have never owned an AWD or 4x4 vehicle or ever needed to do corrective work on a differential. Im definitely new to this genre of drivetrains.