Transmission started shifting hard and rough not like a normal shift. By the way this is for an automatic trans. The dealer started trouble shooting the shifting problem. they replaced the torque convertor. Told me to come pick up the car, I did, and it was still doing the same thing. I took it back to the dealer and they had to call their tech. support for help. They then ordered a valve body and that corrected the problem. Total time this time without my car was 3 weeks.