First this is my first post here and this site is great. I have a 2010 focus ses with 52,000 miles on it. Ford say the transmission fluid doesn't need changed until 120k. I have a hard time believing that. The dealership that I bought it from said that they recommend changing at 65k. They were great to buy from but they are very slow when it comes to maintenance. Like 3 hours for an oil change. But they said that they don't flush the trans with detergents with is what I want I think. They are about 45 minutes from where I live and if an oil change takes 3 hours id hate to see how long this is gonna take. The ford dealer in town said they can do it but its useless if I don't have them run detergents through it. I know everyone has heard of the horror stories when it comes to transmission flushes and how it can cause more problems. Knock on wood there are no problems with this car and I don't want any to start. So what do you guys think or what have you done. Is it ok to run detergents through or should I go with just fluid.