Okay I have multiple questions that need to be answered and it would be great/awesome if I had your help. I have a 2007 mazda 6i 2.3 with 30,800 miles. First of all my transmission is dark brown should I change it?, What place can I do that at, but it has to be a place that has the right transmission fluid and have an idea about what they're talking about. Second question, I heard that when you change your spark plugs it's recommended that you change your spark wires and some other stuff I think, so what is all the things that I need to change when changing the spark plugs. Third question, sometimes when I start slowing down (around 5-15 mph) the rpm goes up about 250-500 rpm is this bad or not? Your answers would really help!
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