It has happened numerous times I went to the dealer the first time they checked fluid and computer on my way then I went back a second time left it there so the head mech could take it home to see if happened to him next day they told me nothing happened they said they reset the computer for tranny and suggested I change the tranny fluid and filter I asked how much 200.00 I paid 1200.00 for the extended warranty for the engine and power train. I drive this car easy that's how I drive hopefully it will help thanks