ATF+4 transmission fluid.
2000 Dodge Dually, Cummins 5.9, transmission fluid is dark is this Rotella brand?
if you have zero transmission fluid it takes 9.5 quarts
its ethier transmission or 75w90 fluid you need to call dodge and ask
You have to remove the pan to drain the fluid.
Should be a filler plug at side of transmission
ATF+4 if its a automatic transmission.
The same place you check the fluid level.