An interesting update. I've been trying to get in touch with a decent transmission place over the holidays to no avail. BUT NOW, all of a sudden, my car's been doing great! No knocks. No lags. No error program. SES is still lit, but other than that, my car's great! Hopefully this isn't a fluke. I'll still have it checked one of these days. But at least, now, I know it's not a mechanical problem, and I thank God for that!