I just went back threw and looked at the pictures of the Motive gear pattern, look at the contact spots at the outer edge of the ring gear at the bottom of the picture.
I took apart the aluminum pinion support and this is what I found, a little sliver of aluminum came out when I pressed out one of the bearings. Also looks galled up.
Here is a video of the races
Look at the see patterns notice there is no contact on the bad area.