Hello and thank you for choosing Just Answer.
There are a couple of TSB (also know as common problems) about the transmission engagment and harsh shifting. You may want to monitor and see if you can feel a hard thumb when the car is shifting. If you feel it, you may want to have them do a rebuild under warrenty.
Other than that, there are not any other "Major repairs that may come up."
Also here you have a maitenence chart for the car.