How to Fix Coolant in Transmission

Are you noticing a regular pattern of red liquid seeping from your vehicle? Are you smelling an unpleasant burning odor? If so, then it’s likely that there is an issue with coolant in your transmission. Coolant is an essential component of every car’s transmission, so if you’re experiencing sluggish shifts and hesitations when accelerating, it could be time to check your levels. Coolant leaks can indicate various problems and some can be more serious than others. 

How to Fix Coolant in Transmission

Fortunately, having to replace or repair coolant related parts does not have to be expensive or complicated. In this post, we will provide the necessary steps on how to fix coolant in transmission for fixing any issues regarding coolant in your transmission so you can get back on the road with minimal disruption and cost! Read on to learn all about potential problems with low levels of coolant and the proper method for adding more!

The Function of Coolant

Coolant plays a critical role in the performance of your transmission. It acts as a lubricant and helps to keep temperatures controlled during operation. Without it, your transmission can overheat and cause permanent damage to internal parts. 

It also protects against corrosion caused by various liquids used within the system such as oil, gas and brake fluid. It also helps to maintain consistent pressure and flow of the transmission fluid. This is important for preventing major issues such as slipping, jerking or grinding when shifting gears.

Low Coolant Levels

Coolant levels can become too low due to a variety of different factors. These include leaks in the system, normal wear-and-tear on hoses, or even a faulty radiator cap that is not sealing properly. If your car has been running hot or you’re noticing an unusual burning smell, it may be time to check your coolant levels and investigate the cause of the problem.

Coolant Levels Can Become Too Low

Knowing How Much Coolant Your Transmission Needs

The first step to fixing any coolant related issue is knowing exactly how much your transmission needs. This can vary depending on the make and model of your vehicle, so you’ll want to consult a trusted expert or reference manual for an exact quantity. Generally speaking, a full transmission should contain between 2-4 quarts of coolant, but always double-check with your vehicle’s manufacturer first.

10 steps on How to Fix Coolant in Transmission

Step 1: Locate the Coolant

Locate the coolant reservoir for your vehicle. This is usually located near the radiator. Locating it can be tricky, so make sure to consult your car’s manual or a trusted mechanic before attempting to do it yourself.

Step 2: Check the Coolant Level

Next, check the level of coolant in the reservoir. If it is below the optimal level specified by your vehicle’s manufacturer, then it is time to add more. Add the proper amount of coolant to the reservoir.

Step 3: Prepare the Coolant

Before adding the coolant, make sure to properly prepare it for use. You will need to mix it with water in a ratio of equal parts before adding it to your transmission. Make sure to double-check the proportions specified by your vehicle’s manufacturer beforehand as this can vary depending on the model of your car.

Properly Prepare It for Use

Step 4: Add the Coolant

Once you have mixed the coolant with water, it is time to add it to your transmission. Start by slowly pouring in the mixture until the optimal level has been reached. Make sure not to overfill as this can cause damage to internal components.

Step 5: Check for Leaks

Now that you’ve added the coolant, make sure to check your vehicle for any potential leaks. If you do find one, it is important to fix it right away in order to prevent further damage or contamination of other components.

Step 6: Test Drive Your Vehicle

Once you’ve added the coolant and checked for any potential leaks, it is time to take your car out on a test drive. This will help you determine if there are any other problems that need attention such as burning smells or jerking/slipping when shifting gears.

Step 7: Check Coolant Levels Again

Once you’ve finished your test drive, make sure to check the coolant levels again. If they are still too low, you may need to repeat steps 1-6 until the optimal level has been reached. Recheck the levels every few weeks to ensure they remain at the correct level.

Step 8: Monitor Temperature Levels

Another important step when dealing with coolant is monitoring your vehicle’s temperature levels. This can be done by either using a gauge or installing an automatic temperature monitor. If the temperatures are consistently too high, you may need to flush the system and add a cooling agent.

Step 9: Inspect Hoses & Clamps

Finally, make sure to inspect all the hoses and clamps in your transmission to ensure they are free of any leaks or damage. If you notice any suspicious activity, it is important to replace them right away before further damage occurs.

Nspect All the Hoses and Clamps

Step 10: Perform Regular Maintenance

The last step in fixing coolant related issues is to perform regular maintenance on your transmission. This includes changing the oil as well as regularly flushing and replacing the coolant. Doing this will help ensure that your vehicle’s transmission stays healthy and functions properly for years to come.

By following these steps, you can easily fix your vehicle’s coolant related issues and keep it running smoothly. Remember to always double-check the manufacturer’s instructions before taking any action and if in doubt, consult a trusted mechanic for advice. With proper care and maintenance, you can ensure that your transmission will remain in top condition for many years to come.

8 Maintenance Tips

  1. Change the oil regularly according to your vehicle’s manufacturer’s recommendation. Changing the oil helps keep your transmission running smoothly and will help prevent costly repairs.
  2. Flush the coolant system on a regular basis to ensure it is free of any debris or contaminants that could damage internal components. The coolant system should be flushed approximately every two years.
  3. Use only high-quality coolant when refilling the system and always make sure to check the proportion of water to coolant as specified by your vehicle’s manufacturer. High quality coolant will help keep your transmission running cooler and more efficiently.
  4. Check the hoses and clamps for any signs of wear or damage on a regular basis and replace them as needed.
  5. Make sure to inspect all visible components such as gaskets, seals, filters, etc., at least once a year in order to prevent costly repairs. The component type and location will vary depending on your specific vehicle.
  6. Monitor the vehicle’s temperature levels and make sure they do not exceed the manufacturer’s specifications. If temperatures are too high, you may need to flush the system and add a cooling agent or other component as needed.
  7. Make sure to top off coolant levels when necessary in order to maintain optimal performance. Coolant levels should be checked every few weeks to ensure they remain at the correct level.
  8. Perform regular maintenance on your transmission and make sure to follow all manufacturer’s recommendations for servicing and repair. Keeping up with regular maintenance will help keep your vehicle running smoothly and prevent costly repairs in the future.
Perform Regular Maintenance on Your Transmission

By following these simple maintenance tips, you can ensure that your transmission stays healthy for years to come and avoid costly repairs down the road. Remember that regular maintenance is key to keeping your car running smoothly and efficiently, so take the time to keep your vehicle in top condition.

Frequently Asked Questions

Do You Need to Follow Any Safety Precaution?

Yes, it is always important to follow all safety precautions when working on your vehicle. Make sure to read and understand all directions before starting any repair or maintenance process, as well as wear the appropriate protective gear such as gloves and eye protection.

How Often Should I Check My Coolant Levels?

It is recommended that you check your coolant levels at least once a month, or more frequently if your vehicle is used for long trips or under extreme conditions. If the coolant level is low, make sure to top off as needed in order to maintain optimal performance.


Every vehicle’s cooling needs are different, and it is important to properly diagnose and address your transmission cooling needs. By taking the steps outlined in this article, you should be well on your way to restoring the integrity of your transmission. When purchasing coolant and repair supplies, it is a good idea to read up on reviews and talk to experts in order to ensure that you are choosing the right product for your car. Be sure to double check manufacturer’s specifications as many aftermarket parts may not meet the necessary specifications.

Finally, by following these guidelines on how to fix coolant in transmission, fixing a coolant issue in transmission needn’t become an overly expensive process. Diagnosing and addressing this issue sooner, rather than later, could save you precious time and effort down the road. As with any major mechanical adjustment or repair project, proper maintenance is key when it comes to maintaining the health of a vehicle’s transmission.

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