Fan will roar after started cold. Fluid needs to 'get it's coffee'
Try this for parts
fan clutch, Ram 2500, 3500, 12 Valve - DIESEL 97-98 $158. 00 $134. 30
Cooling system - Cooling fan - fan clutch
The 134. 30 is what they sell it for
http://www.dodge-auto-parts-dealer.com/parts.htm
will be as good a price for other years
Try this for parts
fan clutch, Ram 2500, 3500, 12 Valve - DIESEL 97-98 $158. 00 $134. 30
Cooling system - Cooling fan - fan clutch
The 134. 30 is what they sell it for
http://www.dodge-auto-parts-dealer.com/parts.htm
will be as good a price for other years