Auto servicing for mums

Why Is Transmission Fluid So Hard to Remove From a Torque Converter?

When you own a car or truck, routine maintenance is important, especially if you want to reduce the risk of a costly breakdown. One of the components that frequently require such maintenance is the transmission. However, removing transmission fluid from the torque converter can be quite challenging and sometimes almost impossible. Why is this, and what should you do to alleviate this issue?

How the Converter Works

Firstly, we need to understand what a torque converter is and how it works. A torque converter is a fluid coupling that is located between the engine and the transmission. Its main functions are to transfer the engine's power to the transmission and to allow the vehicle to idle without stalling. It works by using a fluid that is propelled by the engine to create torque, thus allowing the vehicle to move forward.

Why Does the Fluid Get Stuck?

Secondly, the torque converter is designed to hold onto the fluid even when it's drained. This design is intended to ensure that the torque converter always has enough fluid to function properly. This means that when you drain the fluid, there will still be some fluid in the torque converter.

Is This a Problem When Changing the Fluid?

Because the torque converter can retain a considerable amount of fluid even after being drained, it can cause problems when refilling. For instance, if you refill your transmission fluid without realising that some fluid is still in the torque converter, the old fluid remains in place and can compromise performance down the road.

How to Overcome the Issue

Another reason why transmission fluid is tough to remove from the torque converter is due to the way it is typically done. To remove the fluid, you need to remove the transmission pan and drain it. However, this process only removes the fluid that is inside the transmission. To do this job properly, you need a special machine, and most people do not have access if they try to do the job themselves.

What to Remember

So, it can be difficult to remove all the fluid, but not doing so can also cause significant transmission damage. To ensure that the torque converter is drained of as much fluid as possible, take your vehicle to a professional mechanic with the right tools and expertise to get the job done well. Remember that proper vehicle maintenance is an essential part of ensuring that your car runs smoothly and continues to give you optimal performance for years to come.

If you have questions about your manual or automatic transmission, reach out to a mechanic. 


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