How To Flush A Torque Converter: Level Up The Car’s Efficiency

Learning how to flush a torque converter is vital to keep a healthy transmission system, seamless vehicle operation, and smooth engine movement.

Under bad caring conditions, the torque converter can trigger issues with the transmission.

Regarding automotive maintenance, a transmission flush can free any dirt particles or debris particles from this component.

This guide will walk you through the importance of this task and how to do it right. Let us enlighten all the required procedures for you.

5 Reasons For Torque Converter Cleaning

how to flush a torque converter
What Causes For Torque Converter Cleaning

Before getting how to flush transmission torque converter, see why this step is vital.


Fast heat buildup is possible with a dirty torque converter. It cannot survive such intense heat. Not to mention, other internal engine parts can get harmed by overheating.

Also, it declines the car’s fuel efficiency.

Contaminate The Auto Transmission Fluid

The automatic transmission fluid becomes solid when your torque converter is unclean. The transmission fluid will have a lot of filth, debris, and other contaminants.

Fuel and transmission fluid contamination negatively affect other torque converter parts and other car components. It ruins the stator bearings and turbine fins.

Then, a torque converter flush will eliminate these contaminants.

Slip Out Of Gear

An unclean or broken torque converter is ineffective. It frequently shifts out of gear. It implies that acceleration will just be delayed.

Accidents may occur due to abrupt acceleration, putting your car and your safety at risk.

Abnormal Noise

A dirty torque converter significantly impacts the car’s efficiency since it hampers smooth energy transfer and other internal component functions, entailing constant noise.

The engine can make rattling or trembling noises at this point.

These sounds are not only annoying, but they also point to serious torque converter issues. Adhere to our advice and maintain your torque converter’s cleanliness.

Inconsistent Mobility

Power cannot be adequately transferred to auto trans by a dirty torque converter. The standard power transfer from the engines to the transmission is impeded by dirt.

The performance of the engine would drop accordingly. With dirt clogging any vehicle area, the car can occasionally stop or become slow.

How To Flush A Torque Converter

bench flush torque converter
Flush A Torque Converter

How can you flush a torque converter? We will guide you through two main points: preparation and how to flush. Take a closer look at these sections:


Step 1: 

Regarding step 1 on how to flush torque converter, let the car park on a level surface. Set your parking brake and open your hood. If the engine gets hot, give the entire transmission 30 mins to cool.

Step 2: 

Check out the precise capacity of transmission fluid. Note that this capacity will count both the fluid in the system and in  the torque converter.

You can look for this information in the owner’s manual. Purchase two extra quarts of clean fluid plus the required amount to refill the entire capacity.

Step 3: 

Place a bucket or pan beneath the cooling line for the transmission. This cooling line will either connect to a smaller, separate radiator or the one in dual-core radiators.

Step 4: 

Disconnect the cooling line of your transmission. Direct the flow of the liquid toward the catch bucket or pan. Attach the line to your catch pan, or ask a helper to do so.

Step 5:

Remove your dipstick from the transmission fluid check tube. And here are all the preparation steps on how to clean torque converter out of vehicle.

How To Drain A Torque Converter

After finishing 5 prep steps above, proceed with 6 easy steps to drain the fluid off your torque converter and top it off:

Step 1: 

How to clean torque converter out of vehicle? First things first, turn on the car. Put your transmission gearing in “Neutral” at once. 

At this point, fluid will be released from your transmission cooling line. Make sure the liquid is still dripping into your catch pan.

Step 2: 

Set a funnel at your transmission dipstick tube’s opening. Fill the catch pan with transmission fluid.

Remember to avoid adopting the wrong type of fluid that can cause transmission slipping after changing or flushing.

Step 3: 

After around three-quarters of the fluid capacity has been drained and replenished, shift the transmission through each of your gears.

Throughout this procedure, you will require assistance to continue filling your transmission. Move the transmission back to “Neutral” when it has cycled through the gears, including “Reverse.”

Step 4: 

After exchanging the fluid, shut off the engine.

Step 5: 

Reconnect your cooling line for the transmission. Crank the car up.

Step 6: 

Check the transmission fluid level using the dipstick. Add liquid as needed. Drive your car for about 5 miles before rechecking the fluid level.

These steps above are how to flush a torque converter at home. You can have an expert do it for you if you want.

Tips To Test The Torque Converter

torque converter flush
Tips To Check

While conducting the torque converter cleaning, stick to the notes below to test a torque converter quickly:

  • To activate the engine, turn your ignition key.
  • Press your accelerator twice lightly.
  • Keep waiting for the vehicle to reach idle timely and warm up for 5-10 mins before flushing.
  • Put the car in drive by depressing the brake.

No doubt, besides knowing the guide and tips to drain the torque converter, it’s best to equip yourself with some other signs to change/flush the transmission fluid, like dirty fluid or transmission slipping when cold.


Can I Drive With A Defective Torque Converter?

No. A defective torque converter won’t allow for smooth driving.

Your automobile will experience a host of concerns once it gets defective, including vibrating and shuddering signs, engine overheating, and an acceleration delay.

You can’t drive safely with these problems persisting.

What Are The Sure Signs Of A Faulty Torque Converter?

Listed below are the most obvious symptoms that the torque converter is failing:

  • Engine overheating
  • The converter slipped out of gear
  • A malfunctioning torque converter can be identified if you hear lurching, whirring, or clicking noises.
  • More rapid stalling

Once you encounter one of these symptoms, adhere to the direction on how to flush transmission fluid from torque converter above.

Final Words!

You can improve your car’s overall performance and longevity by flushing the torque converter.

It’s worth the extra time and effort to make sure the job is done correctly so you can enjoy a smoother and more efficient drive.

Hopefully, the above steps on how to flush a torque converter can incentivize your car to achieve tip-top conditions.

Transfer this post link to the auto owners as well!

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