2003 Dodge Neon • 4 cylinder Automatic • 84,000 miles

03 neon. 84,000 and Bad vibration at idle. Changed the engine strut mounts. Only code pulled is 441. That has been coming on once a year for the last 3 yrs. Car is all tuned up. Appx. 3 yrs ago trans cooler blew and antifreeze mixed with trans fluid. I had it flushed out then. Possible vibration is from torque converter? I coded a 740 last year and changed the solonoid. Any suggestions to check?
May 30, 2011.

It could be the converter. Also, check for vacuum leaks as well as a partially plugged converter.