I was driving my truck and when i came to a stop and tried to put it in reverse, I did not have reverse. After several attempts of moving the gear lever there was a loud clunk, then I had reverse. Then when I then put it into drive it would not move. The vehicle has 35,500 miles. Dealer believes its the K1 snap ring in the aisin transmission. It is still at the dealer and they believe it will takes months to get the parts. Dealer has the same issue when it was dropped off. No warning lamps or symptoms prior to attempting to put it in reverse. Vehicle just stopped moving.