One problem related to axle shaft seal has been reported for the 2005 Dodge Ram 1500. The most recently reported issues are listed below.
05/Dodge truck Ram 1500/quad 140wb 4x2 transmission shifts all the time in over drive . It doesn't shift in tow/ haul like that. After four times in shop they say this normal to do this. 1,400 miles later the rear axle pinion seal was leaking. Seal#52070340-ab. They just change the seal and add lubricant#4874469. In passing a car it will run up too 5800 rpms,then go to 2500 rpms then 1800 rpms.