1995 Buick Roadmaster won't move?

A homemade transmission cooler line hose slid off yesterday while I was at a light. I gave it a little gas for a few seconds before I realized it wouldn't go. I assumed it emptied the transmission fluid so I put the hose back on and put 4 quarts in it. It still wouldn't move so I had it towed home on a flatbed and checked the fluid today and it appears it is overfilled but still won't move. It always worked well before with regular fluid and filter changes.and I am wondering if it was damaged because of the fluid leaking out. There was a large puddle of red transmission fluid from the hose where it quit. Any help is appreciated. If it is repairable I will get new transmission lines instead of repaired old ones!