One problem related to manual transmission has been reported for the 2003 Dodge Ram 2500. The most recently reported issues are listed below.
Truck makes a metallic knock noise above 40 mph push in the clutch and the noise goes away. Have taken it to the dealership several times and have driven the truck with service writer and 2 mechanics. They have heard the noise but do not know what it is or what to do about it. I have also complained to diamler Chrysler and they are unwilling to do anything.