Jessica, if your fluid level is in the normal range on the marks on the dip stick, again don't do anything. I will give you a link to a treatment you should try before changing the fluid or certainly before giving up on this transmission.
Not trying to be a know-it-all. Been there. Done that. I have brought transmissions back from the dead.
Not trying to be a know-it-all. Been there. Done that. I have brought transmissions back from the dead.