Axle ID

[004x41500]

Front Axles:
1994-2001 1500: Dana 44
1994-2001 1500 Off-Road: Reinforced Dana 44
1994-1995 Light-Duty 2500: Dana 44
1994-2002 Heavy-Duty 2500: Dana 60
1994-2002 3500: Dana 60

Rear Axles: (2500/3500 only: Depending on what engine/transmission was equipped from the factory.)
1994-2001 1500: Chrysler 9.25
1994-1995 Light-Duty 2500: Chrysler 9.25
1994-2002 Heavy-Duty 2500 5.9L gas V8: Dana 60
1994-2002 Heavy-Duty 2500 V10/diesel auto: Dana 70
1994-2002 Heavy-Duty 2500 V10/diesel manual: Dana 80
1994-2002 3500: Dana 80


Source: http://dodgeram.org/tech/specs/Ramspecs.htm

Thanks to JasonW over at DF.