Hello, I just checked the trans fluid in my wives `s G20, it has a slight brown tint to it, and has a slight burnt smell to it, the fluid has not been changed since we owned the car, she has gone about 60,000 since we purchased. What do you guys think about doing a pan drop, then having the fluid flushed and filled, and also do I use a low detergent fluid so as not to cause any problems, thanks.