Hi y'all, new here, but figured you would get a kick out of my experience today.
I just picked up a MKT EcoBoost with over 100,000 miles last week. Took it to the local Lincoln dealer today to get all the fluids changed, and based on all the threads here, talked the service advisor into changing the fluid in the PTU. Of course they don't have a standard code for that, but after talking to his tech, he figured something out.
I asked to see the old fluid, or sludge as I called it, and he obliged. I'll be darned if the fluid looked brand new! I could see through it, and it still had a faint pinkness to it. (I'm kicking myself for not snapping a pic, sorry!) I give it a small chance the previous owner had it changed, as he got service at local lube shop close to his house.
But no metal, no blackness, it looked fresh! 100,000 miles! Just wanted to throw it out there as a data point.