O.k so I've been searching this site and I'm still a little confused, I bought an 03 g35 coupe 5at with 60k on it and I noticed it shifts hard sometimes. I was going to do a flush and after reading some posts on here, Im not sure what to do. I don't know what kind of service the previous owner had done. I'm just wondering if I should have a full flush done or just drain and fill. I know this is frequently asked but like I said I'm still confused. Thanks alot in advance.