The temperature of transmission fluid is regulated inside the engine cooling system. … Any rupture of the internal radiator tank can allow coolant to mix with, and contaminate transmission fluid. The engine coolant can also become polluted by the transmission fluid, as the pressures of either liquid vacillate.
What happens when coolant and transmission fluid mix?
There is a separate tank and hose in the radiator for transmission fluid. They allow the coolant to take heat away from the transmission fluid without mixing the two liquids. When a leak occurs, the transmission fluid and engine coolant mix with each other causing your transmission to seize up.
How do you know if coolant is mixed with transmission fluid?
Look at the color of the transmission fluid. Fresh transmission fluid is a bright red color due to dye that is added to the fluid. If the fluid is a milky pink color, it has either antifreeze or water in it.
Does coolant affect transmission?
To cool the transmission, the fluid is directed through a cooler that sits inside the radiator. When the engine cooling system is working properly, the engine coolant passes over the transmission cooler in the radiator. … The heat continues to increase in the transmission, causing parts to expand and pressures to build.
How do you know if there’s water in your transmission fluid?
If water has reached the transmission fluid, then it’s in the transmission system. Transmission fluid will usually be a bright red color, but if water has infiltrated it, the fluid will turn gray.
Can low coolant cause transmission problems?
Transmission failure – In some cases the transmission fluid cooler is internal to the radiator, meaning that a lack of engine coolant can not only cause the engine to overheat, but also the entire transmission. The engine may overheat and cause even more problems.
What does it mean if my transmission fluid looks milky?
The milky substance you are seeing on the transmission dipstick is a result of cross-contaminated coolant and transmission fluid. More than likely, your radiator has failed which has allowed coolant to enter the transmission system. When coolant enters the transmission, it will cause failure very quickly.