I knew something was wrong when I was poking along in traffic and at around 1,500 rpm @ 35 mph, it felt like I was driving over a long stretch of rumble strips, like the ones they use on the shoulder of some highways or to warn of an upcoming toll plaza. The entire car shook at a very high frequency and the pitch of the sound it made would go up and down as I gave/let off the accelerator. At about 2,000 rpm, it would stop and make no noise and no vibrations. This would only happen at between maybe 5 and 40 mph, never at highway speeds and it really shook A LOT. It would come and go, but mostly happened after it sat for at least a few hours and cooled down. The noise was embarrassing and as a temporary fix, I would manually shift into a lower gear to get the rpm up over 2,000 where it stopped. It started getting bad very recently and I noticed that when I would come to a stop, when the transmission would drop into neutral, I could feel a little jerk, which isn't normal for any automatic I've driven.

I know of no TSB or known issue regarding the torque converter for the Crossfire. There are a few other threads out there where other forum members have experienced similar symptoms. I say, if this is happening to you and your service department can't figure it out, then you may just have to keep driving it until something breaks and you have proof that something is wrong. The main indication that something catastrophic happened with mine is when a few days ago, it bucked and then stalled at a stop sign in my neighborhood. When I told the service manager that is what happened this last time, I think the mechanics took things seriously and opened up the transmission. They were also able to replicate the symptoms when they test drove it after I dropped it off.