Fluid for what? Transmission, brake, Power Steering, oil, radiator? I am going to assume you are talking about A/T fluid. Use ATF+4.
DOT 3
A 2000 Dodge Ram uses green coolant.
A 2001 Ram uses DOT 3 brake fluid.
For a Dodge Ram 1500, you need to use ATF+4 for power steering fluid. ATF+4 is compatible in vehicles that used ATF+3 for power steering fluid.
+4 trans fluid
R134a
R134aR134a
Mopar ATF+4 (what is specified by Dodge) is synthetic.
It is not recommended by Dodge, but it might work in an emergency.
Synthetic 75w90
Mopar ATF+4
Use ATF+4 only.