Last Saturday I was driving on the highway at about 80 mph on cruise control. I saw the cruise control light pop off and the vehicle started decelerating. I put my foot on the gas and the vehicle wouldn't accelerate but the RPMs went up. I was able to safely get the vehicle over to the shoulder. I towed it to Honda and they said the transmission is shot. Is it possible it could be anything else? It's a 2004 AT with about 140k miles on it. Until then I have had no problems with the transmission.