Regarding this shoulder ratchet issue TFW2005 user Big Broad Rim has posted a solution using E-Clips.
Post # 12963 in the thread I have linked above.
Quite a clever solution I think though I'm yet to try it myself and don't know if I'll have to yet, my Dinobot is still about a week or so away from arriving.
Post has been updated with e clip size and lube recommendation: