I'm brand new to this site, just joined TDR. I recently purchased a 1998 3500 Ram with a Cummins via the internet and I have no previous diesel experience. I'm still sorting out some problems, one of which is the torque converter not locking for long. However, the question I have at the moment is about the muffler. It has a nasty rattle at certain rpms, must be a broken baffle or something. I'm a conservative guy and I am wondering if it is worth going with an upgraded exhaust system, or just replace the muffler at a local shop. Price is of some concern and I'm not looking for more sound. I live in GA so rust is not going to be a major concern.