You squirt it into the fill hole on the pass side of the trans case after removing the fill plug.
The automatic uses ATF+4
Fluid is overfull, or there is water in the fluid.
2000 Dodge Dually, Cummins 5.9, transmission fluid is dark is this Rotella brand?
Filter service is about 6 quarts. Dry fill is about 16 quarts.
ATF+4 auto trans fluid.
The fill/check plug is on the driver side of the transmission case. The fluid should be level with the bottom of the hole. You need a 3/8 inch allen wrench to remove the plug.
Mopar ATF+4
Use ATF Plus 4
The automatic transmission uses ATF+4. The manual transmission uses a special manual transmission fluid from Mopar.
It is a special oil that only the dealer has.
Remove transmission oil pan for filter access
Mopar ATF+4