One problem related to transmission solenoid has been reported for the 2004 Dodge Ram 2500. The most recently reported issues are listed below.
2004 Dodge Ram 2500 has an unknown transmission problem. Shifts okay from cold start, but sporadically it will not shift into 2nd gear when engine is warm. Once the engine is warm, if the engine is turned off and then is restarted (such as a stop at a store, gas station, etc. ), it goes into first gear okay, but then winds out and will not shift into 2nd gear. The only way to get it to shift again is to turn the engine off and then restart it. Then it will shift correctly. This is dangerous because many times when we pull out into traffic there is no place to safely pull to off the road to stop the engine. We have had to pray for red lights so we could shut off the engine off for a moment. We have had the governor pressure sensor replaced twice and have also replaced the transducer and the transmission solenoid and the problem remains.