Just completed this today. Well, almost; still 2 skid plates to bolt up.
My truck had just about 87K even on it. I was actually pleasantly surprised that the old fluid looked as good as it did. It was dark, but not sludgey at all, and just a bit of mush on the magnets.
I would estimate I got about 6 liters of new fluid in. Maybe a bit more, but hard to be more precise as there was some spillage during my contortions under the truck.
As noted previously in this thread, no need for a hacksaw. The old filter neck snapped easily with one sharp ****.
One odd note is that when doing the final fill I tried to use my iid tool to read the fluid temp directly. It read 20c at startup, but never varied from there. I used my IR temp gun as a backup on the metal pan and did the final fill at an indicated 39.4c while the iid still said 20c.
I also dropped the mechatronic unit and replaced the bridge and tube seals. This was timely as the old bridge had snapped a piece off.
Test drive is complete, and she shifts as expected, so a sigh of relief there. Monkeying with the mechatronic had me a bit nervous after some of my research.
A lift would make this a breeze, but it is doable on your back in the garage.
ETA: . For anyone doing their research, I did not reset the adaptions after changing the mechatronic bridge/seals. No issue with error codes or shifting for me after 200 miles driving today.