What happens when you put too much tran fluid in? About an inch or a little more over the crosshatch? Thank You

go to Autozone and buy one of those cheap plastic/PVC siphon hand pumps with a 5 FOOT HOSE ON IT AND TRY TO GET THAT EXTRA ONE INCH OUT THROUGH THE FILL TUBE..Victor/Siphon pump>>Part Number: 00782-8>>>$2.99 plus tax!

What happens if you leave it overfilled (and that one inch is a lot of excess fluid!), is that the fluid will foam, and you will be operating with a mix of air and transmission fluid. It would not take long to ruin the transmission. Follow Stevieray1's advice ASAP.