One problem related to axle hubs has been reported for the 2004 Dodge Ram 1500. The most recently reported issues are listed below.
Failure of front wheel bearings on my 2004 Dodge Ram 1500 at 29,400 miles. Resulted in loss of brakes almost causing an accident. Wheel bearings were replaced, I do still have the old ones. The left front was so bad it was ready to seperate from the hub. I'm told by the dealer that this is a common problem although Chrysler has not addressed it.