The transmission fluid plays a vital role in smooth gear shifting. It lubricates the components responsible for transferring engine power to the wheels. The colour of this fluid can tell you a lot about the overall health of your vehicle’s transmission. It can also help in diagnosing possible issues with the transmission. To determine whether the fluid is in good condition or needs to be replaced, you must check the transmission fluid colour.
Dive in to learn what each colour of the transmission fluid means.
Transmission Fluid Colour Guide
As the transmission fluid gets older, it gets contaminated and oxidised. The level of contamination and oxidisation can be observed via the colour of the fluid. Once the transmission fluid colour goes from bright red to dark brown, it means it is time to replace the fluid to protect your car’s transmission.
Here is a detailed explanation of transmission fluid colour meanings and the necessary actions one must take in each situation.
Bright Red
New transmission fluid typically has a bright red colour. It is see-through and viscous without any contaminants. It has not been oxidised and can efficiently lubricate the transmission parts. A bright red fluid ensures protection for the transmission components and facilitates gear shifting.
No action is required in this case. You can drive your vehicle without any worry. However, make sure to inspect the transmission fluid at regular intervals to keep an eye on the colour of the fluid. Additionally, follow the car’s maintenance schedule to avoid any potential issues.
Light Brown
A light brown transmission fluid is not a reason for concern. It indicates that the fluid is still in working condition, however, it is getting older. It poses no danger to the vehicle’s transmission and can still effectively perform its function by lubricating the components such as the transmission shaft among others.
You do not have to change the fluid yet as it can still last a bit longer. However, it also indicates that you require a transmission fluid change in the near future. Therefore, you must schedule a car maintenance appointment soon before the fluid turns dark in colour.
Dark Brown/Black
A dark transmission fluid indicates that the fluid is very old, contaminated and possibly oxidised. If the fluid gives off a burnt odour, it confirms the oxidisation. Oxidation refers to the formation of bubbles in the fluid. This shows that the fluid is no longer viscous and can not perform its job effectively.
Oxidised transmission fluid can significantly damage your car’s transmission. It does not provide the necessary lubrication required for the effective function of the transmission parts. The lack of lubrication results in excessive heat build-up which causes the components to wear out faster.
If you use the dark opaque fluid for a long period, it will cause irreparable damage to the internal components and lead to transmission failure.
You need to change the transmission fluid immediately if you see a dark colour or smell a burnt odour. If the damage is already done to some of the transmission parts, the transmission might need to be flushed completely. In extreme cases where the transmission has failed, you may need to rebuild the transmission.
Pink
Transmission fluid is not supposed to be pink or cloudy. If you peek into the transmission fluid reservoir and see pink liquid, it means the engine coolant is likely leaking and mixing with the transmission fluid. It could also mean that the fluid is diluted with water.
This diluted or contaminated fluid can not lubricate the transmission parts and can easily damage your car’s transmission. In this case, visit a mechanic and get the fluid drained from the reservoir. The mechanic will also check for leaks in the coolant reservoir to ensure no further leaks are detected. You can then add fresh bright red transmission fluid into the reservoir and resume your travels.
When to Change the Transmission Fluid?
It is recommended to change the transmission fluid every 2 years to ensure good health of the transmission. Heavy vehicles may require more frequent changes as they generate more heat. Make sure to take a look at the owner’s manual to check when the fluid should be changed for your specific vehicle.
However, it is also important to inspect the transmission fluid regularly to keep an eye on its colour. A dark brown or black transmission fluid shows contamination and oxidation and it needs to be changed immediately. Do not wait for the fluid to turn black and change it as soon as you see a brown fluid in the reservoir.
FAQs
What is the Best Colour for Transmission Fluid?
The transmission fluid should have a bright red or a slightly darker red colour. This shows that the fluid is normal with no contaminants. However, if the fluid colour is brown or black, it needs to be flushed promptly.
What Does it Mean When the Transmission Fluid is Dark?
A dark transmission fluid means that it has been oxidised and can no longer lubricate the transmission parts. It also shows contamination and needs to be changed to ensure healthy transmission.
How to Tell if Transmission Fluid is Bad?
Check the transmission fluid reservoir to look at the fluid colour. If the transmission fluid is dark in colour or gives off a burnt smell, it means the fluid is now bad and needs to be replaced. The dark colour shows contamination and oxidisation.
This is all about the transmission fluid colours and their meanings. Be sure to inspect the transmission fluid levels and appearance regularly to ensure a transmission system.
In case of transmission failure due to black and contaminated fluid, the repairs can be heavy on the pocket. It is recommended to change your vehicle for a smooth driving experience. If you are looking for a new vehicle with modern features, browse through new cars for sale in the UAE to find your next ride.
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