I have a 2009 Honda Fit with an automatic transmission and almost 200k miles. I was driving and my check engine light came on, the D light started flashing (the light that shows which gear you're in), and the car was shifting weird. I had the codes read and the two that came up were P0756 and P0847. My dad is going to help me fix it, exactly which parts do I need to order? From what I've read online, I think I'm going to change the transmission fluid, then replace these parts: 28600-RG5-004 and 28260-RG5-004. Is this correct? There's also a gasket for the solenoid (28262-RPC-000), does that need to be replaced also? Any help is greatly appreciated!