If you experience a harsh downshift from fourth to third gear, the transmission control module (TCM) software should be checked and updated if necessary before any other repairs are performed.Google+
Car Problem Reports
Dodge Grand Caravan Updated TCM Software Available for Harsh Downshift
Dodge Grand Caravan Problem
Model Year Affected: 2003
Visitor, 2003 Dodge Grand Caravan, 114,000 mi
I have the same problem when downshifting. Between 4th and 3rd you get a harsh shift. I have been told to flush the trans fluid and get the PCM / TCM reflashed to see if that corrects the problem. I flushed the trans no luck. I now have to pay a dealer 120.00 to reflash the software to see if that saves me from rebuilding the trans @ 1500.00.