I'm ready to fill up my new Dana 60 that has a eaton true-trac differential installed. Eaton says to use 80w90 non synthetic , but when I ordered the gear oil for it, I accidentally received 85w140 non synthetic for it. Will this cause any issues using the heavier oil? I personally don't think so, since the true-trac doesn't have any clutches in it, but I'd rather ask just to be safe. Thanks