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I own a 2004 KIA Optima, and was wondering if I should change the transmission fluid or not. I bought the car used at 44000 miles and it currently has about 83k miles. I'm not sure if the fluid was ever changed before I bought the car.
My transmission slightly slips at times, even more so when it's cold outside. I am asking this because I heard changing the transmission fluid and filter can be risky. Any insights are greatly appreciated.