Left transmission oil can seems to have water in it

[Ted]

Hi all,

I changed my transmission oil around 8 months ago. Since there was some oil left i kept it at home. Last week due to oil cooler hose leakage i refilled few mils from that oil can. When I poured from that oil can I saw there was some small residue (milk like) also in the oil. After a week today when I again tried to use some transmission oil from that can I saw it was very diluted like and water kind of a liquid was there. I am 99.999% sure thay no one had poured water to my oil can. Does anyone has any idea on it? I am going to drain oil tomorrow since if water had gone already to my transmission box, when I poured thag few mil I wonder what had happened ... system is working fine anyhow...

[Davy]

Transmission oil inside a can with a broken seal breaks down much much faster than when it's in a sealed can or inside the transmission. Since the amount of empty space within the can is occupied by air, it will have moisture in it which condensates inside the can, depending on the outside weather. In a hot and humid country like Sri Lanka, this can lead to the oil breaking down quite fast. If the cap was not tightly sealed, if the can was placed in a place where direct sunlight can get to it, this can become worse. 

If you accidentally poured water into the transmission, I'd advice flushing out the oil and replacing with new oil. 

[Twin Turbo]

Using contaminated ATF will cause long term probs on your vehicle.

Edited March 24, 2018 by Twin Turbo