car stopped moving forward or reversing

What is your question?

driving up medium grsde road, engine revved up, car stopped moving forward and started rolling backward. Have dual transmission, was in automatic mode. tried the shift mode - no go. No noise was heard, no fluid leak, no smoke, no parts falling out of bottom of car. Had car towed home, tow driver said he heard a clicking noise near the driver's front wheel, maybe an axle broken? Steering was fine with engine running, but no movement. Is this definitely a transmission problem? DO you know of a dealer within 50 miles of 30513?