What happens to the transmision that does not shift any gear

Question

I have runned the car for 100 miles and when i was getting home driving uphill the car was slowing down and the transmission was slipping the shift. When i got home i parked the car in the garage. Early in the morning today i started the engine and after heating the engine i shifted to drive and the car doen not move. It does the same in any gear even in reverse. What coud be the prossible cause because the transmission oil level is OK and i can shift to any gear but the car does not move.

Answer 1

The problem would be internal of the transmission, low hydraulic pressure being developed. No sensor or actuator is going to cause this problem , this is a transmission internal mechanical failure.