I've been having issues with is believed to be my transmission. The problem is it only seems to be temporary and the codes that are on the system aren't happening when I drop the car off. It's playing a wonder game of hide and seek. They've been very patient with me and letting me drop off my car. There has been no rush to just replace the transmission. Anyway, in the meantime, my muffler went along with one of the oxygen sensors and they replaced / fixed both of them. So, now I'm back to waiting for the transmission.