Well i finally had some time yesterday. I popped open the rear axle and this is what it looks like.
I didn't see any loose parts, i wiggled it and there was no play. I didn't see no metal shavings. I did see 1 chip on a tooth, wasn't that big at all, could this be a problem?
Let me know what ya'll think!
BTW it wasn't sticking or getting stuck when I was turning the gears, I did my best doing 1 turn at a time with 1 hand!