How can i differentiate between engine oil or transmission oil in ford expedition radiator water?

Engine oil would be blackish looking. Transmission fluid is reddish to a pink color. The only way trans fluid would end up in the radiator would be if you had a cooler line hookup crack at the radiator. Which is highly unlikely.How can i differentiate between engine oil or transmission oil in ford expedition radiator water?
Engine oil will appear dark gray or black in the radiator while Transmission fluid will appear slightly pink or red.How can i differentiate between engine oil or transmission oil in ford expedition radiator water?
as previously stated, engine oil will look black or yellow, (depending on how old it is) while trans fluid will be between pink /red and red/brown.





Trans fluid in the radiator is going to mean an internal leak in the radiator, while the enigne oil we have discussed previously...
check the engine oil and transmission oil to see if there is any milky stuff on the dipstick. Keep in mind that antifreeze + engine oil= super thick substance that will eventually result in bearings being starved for oil
Take a cup, pour it in the cup, set it down on the driveway and look at it. If it turns blue after a couple hours, it's what you were looking for. Have fun!
There are radiator cooler lines that may run through the bottom of the radiator. If the radiator is bad, you may see a lighter colored oily film, lighter than oil would be. Check you oil and tranny fluid for cross contamination, or low tranny fluid.





The viscosity of tranny fluid is lighter than oil.
transmission oil can't get into your radiator water.