What can I do? It never gave a problem. One cold day It needed trans fluid so I made it go. It reached the destination and never went forward again.

 

If you topped off the fluid and it still won't move I would drop the fluid pan and inspect for any debris besides the normal fuzz on the magnets. If you see any you'll need a rebuild. May need one anyway. Make sure the Transmission Control Module (TCM) mounted on the fender wall near the power steering reservoir and solenoid pack electrical connections are clean and tight. If all looks good you'll have to have a shop look at it.

Are you getting a service engine soon light?