I completely ripped apart my M10000 when I had motor issues, turned out to be stuck brushes. (the motor was so sold the brush holders were steel not brass and rusted.) I decided to clean regrease everything as the stuff in the gear box was about 30+ years old. The one part I don't agree with in those videos is the limited use of grease and spraying wd40 into the gear box.
Personally I greased the free spool ring gear on both sides and it works fine. However, I used Shell MS33 (the synthetic version of the grease warn recommends) it's designed specifically for sliding parts and to repell water. (it's also really hard to clean your hands after as it repells the water in hand cleaner

) I also packed the gears full, particularly the open area about the largest gear, again to help keep water out of there.
As to using wd40 to lube the free spool gear that's a terrible idea. Wd40 is a degreaser all the stuff that goes out the sides of that ring gear will contaminate and brake down the grease. Particularly after years of doing it every month. It's also not a particularly good lubricant, if you want to not grease it because it will add resistance to your free spool (not much) then at least use a light oil or something like it. Wd40 was one of the 2 cleaners I used to degrease mine, not cool.
As to the ring, my M10000 didn't have that part I don't think so I couldn't say.
Chances are though like on his, if your solinoids test good and you connections are solid, it'll be in the brush area of the motor. Look for stuck brushes or green death.
Edit: Just went back and realized I was thinking of a different part of the video. That guy is absolutely correct, he blew the reinstall of the brake. It's trying to work backwards on the cam now and while it may function as he says, it's probably not working as well as it should. I suspect if you hang the truck on it hard it will run away. It's also probably dragging a bit when winching in. The cams should ride up the shallow side of the ramps.
—
There must have been a time
when we could have said no.