Transmission issue If you press the gas, it just revs the engine

Is the check engine light on? If so, this guide can help us get the codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also, what did the fluid look like was it burnt? If so the transmission may be worn out or the fluid pump is bad. Here is how to change the transmission out and the fluid pump if the fluid is okay. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.