Do I have a transmission issue or something smaller?

Found the issue I hope. A hose had come off. it was put back on and fluid added. The car shifted fine and is home. I am not sure how much fluid to add and put one gallon in. The reading is only showing about 1/4 inch on dip stick. I was told it would only need 4 quarts........Thank you for responding.

You're welcome. Be sure to check it on level ground.