One problem related to transmission gear slipping has been reported for the 2004 Dodge Ram 2500. The most recently reported issues are listed below.
I parked at a local gas station to go inside to pay. I left the truck running with it in park. After I was inside for approximately 30-45 seconds, the trucks gear shift slipped out of park and into reverse, causing the truck to run backwards, finally striking a gas pump and knocking it over. I was able to reach the truck and stop it before it went any further. I had my bumper replaced as it was damaged. There was a claim for approx $25,000. 00 to replace the gas pump.