My S60 transmission (~56k miles) has been shifting roughly recently. I have noticed it on cold mornings and when I pull into my driveway, it shifts into 1st gear roughly. I called the dealer and they said that a fluid flush and refill will cost $300 and may not fix the problem. They also told me that there is a software upgrade for it that may fix the problem and costs $100. Has anyone else had this problem? My car is a CPO, should the warranty cover the software upgrade? They told me to bring it in for diagnosis but, everytime I do, they can't find any problems.