Automatic Transmission not going into gear

[Avirex]

Hey guys. Yesterday on my drive to a friend my tt auto supra just stopped pulling. I first thought it was the accelerator or something with the engine. While slowly rolling on the highway I gave it some gas and the rpm shot up. Its like the car is in neutral. When the car stopped I tried putting it in reverse and even manual mode would not move the car. You can push the car when its in neutral so I dont think its something with the transmission (Clutch maybe?) After a while I checked the fluid level of the transmission fluid and it looked ok. Does anyone have an idea of what it could be before I pull of the entire transmission