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Top 10 Best Transmission Coolers On The Market In 2021 Reviews

Your vehicle’s transmission system allows you to shift your gears. It needs to stay cool because of all the friction that occurs between the parts. Automatic transmission fluid or ATF plays a significant role in cooling down the system.

If the transmission gets overheated too frequently, its overall lifespan gets affected. The common causes of overheating are towing heavy loads and heavy driving. This is where transmission coolers come into play. Best transmission coolers allow your vehicle’s automatic transmission fluid to remain cool for long in various conditions.

But there are different types of transmission coolers of several brands are available on the market. This guide will assist you in picking the best transmission coolers for your automatic vehicle. So keep reading to find everything you need to know about the best transmission coolers, money can buy.

transmission coolers

Best Transmission Coolers Comparison Table

ProductsDimensionsWeightGVWRTowing RatingRating
0.75-inch x 11-inch x 9.5-inch
1.1 pounds
24,000 pounds
Towing Rating
5,000 pounds
5 out of 5 stars (5 / 5)
21-inch x 13.7-inch x 11.3-inch
2.63 pounds
30,000 pounds
Towing Rating
10,000 pounds
4.8 out of 5 stars (4.8 / 5)
2.3 pounds
20,000 pounds
Towing Rating
2,500 pounds
4.6 out of 5 stars (4.6 / 5)
11-inch x 7.25-inch x 0.75-inch
3.53 pounds
25,000 pounds
Towing Rating
4,000 pounds
4.6 out of 5 stars (4.6 / 5)
11-inch x 12-inch x 0.875-inch
2.5 pounds
22,500 pounds
Towing Rating
7,000 pounds
4.7 out of 5 stars (4.7 / 5)
16.9-inch x 8.6-inch x 2.9-inch
4.19 pounds
22,000 pounds
Towing Rating
6,000 pounds
4.5 out of 5 stars (4.5 / 5)
18.62-inch x 13-inch x 2.12-inch
8.5 pounds
23,000 pounds
Towing Rating
7,500 pounds
4.5 out of 5 stars (4.5 / 5)
10.00-inch x 7.50-inch x 4-inch
4.94 pounds
21,000 pounds
Towing Rating
6,000 pounds
4.2 out of 5 stars (4.2 / 5)
16.9-inch x 8.6-inch x 2.9-inch
5.15 pounds
26,000 pounds
Towing Rating
10,000 pounds
4.5 out of 5 stars (4.5 / 5)
11.00-inch x 8.00-inch x 1.5-inch
3.00 pounds
20,500 pounds
Towing Rating
4,500 pounds
4.6 out of 5 stars (4.6 / 5)

Top 10 Best Transmission Coolers In 2021 Reviews

1 Hayden Automotive 678

The Rapid-Cool 678 transmission cooler by Hayden Automotive is well suited for vans and pick-up trucks and you can use it for Class C motorhomes as well along with travel trailers. Ensure the length of the travel trailers that need to be 24 feet.

It is suitable for a vehicle with a gross vehicle weight rating of 24,000 pounds and is rated for towing up to 5,000 pounds. The transmission cooler comes with patented internal turbulation and can conveniently increase heat transfer with a minimum of pressure drop. Thus, your vehicle transmission system will keep working at its optimum rate.

One of the best features of this transmission cooler is, it comes with pre-drilled holes and mounting brackets. It means you can conveniently install it inside your vehicle. And the best part is, you don’t need to go with any additional hardware. Everything is included in the kit that comes with your purchase.

You don’t have to replace your transmission fluid as frequently as well. And of course, it will allow you to save some cost on your transmission repairs and refills. Your coolants will last longer and the transmission system won’t need to go through a lot of repairs or replacements.

Installing this kit is not a big problem either and it will go near your stock coolant in your vehicle right next to the radiator. There are no fancy tools required and you can get the job done in no time.

Hayden Automotive 678
Our rating:5 out of 5 stars (5 / 5)


  • Ideal choice for all Class C motorhomes, vans, and trucks.
  • It can also work well with 24 feet travel trailers.
  • The transmission cooler is rated for towing up to 5000 pounds.
  • Rated for an overall vehicle weight of 24,000 pounds.
  • It has a minimal pressure drop due to its patented internal turbulation.
  • Simple to install with pre-drilled mounting brackets.


  • Its hose might be too short for some vehicles.

2 Hayden Automotive 679

The 679 Rapid-Cool transmission cooler by Hayden Automotive weighs more than two and a half pounds. It is best suited for Class A motorhomes, 5th wheel trailers, and large-sized travel trailers.

The 679 transmission cooler is rated for towing up to 10,000 pounds and is best suited for a gross vehicle weight of up to 30,000 pounds, so this cooler is designed for heavier vehicles.

This transmission cooler also comes with a patented design of its internal tabulation system for better heat transfer. This design ensures the system doesn’t have to deal with any pressure drops and remains effective in the overall operation.

And that is not all…!

This system is the best option for you to consider if you are looking for an easy and tool-free installation. The kit comes with all the parts you need to get into your transmission system.

What’s more…!

It comes with mounting brackets that have pre-drilled holes in them. Therefore, the installation becomes simpler.

When you have this transmission cooler installed in your system, it will keep the friction at a minimum level and keep the transmission fluid cool as well. Therefore, the entire transmission system will remain safe from overheating and your vehicle will continue to work soundly.

However, you need to keep an eye on the fittings. You might end up buying an entirely different fitting because of the difference in the threads. You have to be sure because with non-adequate installation you can risk leakages and the fluid won’t work very well.

Hayden Automotive 679
Our rating:4.8 out of 5 stars (4.8 / 5)


  • Not that difficult to install.
  • Everything is included in the kit.
  • Pre-drilled holes are there within the brackets for easier installation.
  • The patented design of internal tribulation.
  • Improves heat transfer and keeps the pressure drop at a minimum.
  • Rated for towing up to 10,000 pounds.
  • Best suited for gross vehicle weight of 30,000 pounds.


  • Threading might vary during the installation process.

3 Hayden Automotive 677

The 677 transmission cooler by Hayden Automotive is ideally suitable for pick-ups, full-sized and medium-sized cars.

The transmission cooler is rated for gross vehicle weight of around 20,000 pounds. It is also rated for towing up to 2,500 pounds. Therefore, it is designed for a range of different vans and trucks. But that’s not all! As it is a Hayden Automotive product, therefore, it comes with a patented design for its internal turbulation. With this design heat transfer remains at its best and the system doesn’t need to go through any pressure drops.

And here’s more! This transmission cooler comes with its mounting brackets that have pre-drilled holes in them. Therefore, you don’t have to make a huge mess when it comes to installation.

The hose is 19mm thick and comes with a barbed design. Hence, it is going to hold its positions for a secure attachment. All rapid-coolers by Hayden Automotive come with a flow-path construction and this design increases heat transfer. Your transmission fluid will remain cool and the entire system will keep running without any overheating issues.

It will keep your transmission running on average in terms of passive cooling as compared to the stock radiator. Therefore, it will require you to install a permanent fan if you are looking for the best performance.

The cooler doesn’t need much tubing either. The only thing you need to do is tighten the clamps properly. They might seem tight but you will notice they need a couple of turns more.

Hayden Automotive 677
Our rating:4.6 out of 5 stars (4.6 / 5)


  • Best suited for full-sized, midsize cars as well as pickups trucks.
  • Rated for towing up to 2,500 pounds.
  • Gross vehicle weight rating of 20,000 pounds.
  • Increases the transfer of heat and keeps pressure drop minimum.
  • The patented design of internal turbulation for better performance.
  • Super easy to install with pre-drilled holes in the mounting brackets.


  • The size of this transmission cooler is so small that it is only suitable to aid the OEM cooler.

4 B&M 70268

The 70268 transmission cooler by B&M is a premium quality product with quality aluminum materials. Due to its size, the transmission cooler weighs around three and a half pounds.

It has a rigid design that features stacked plate construction and is resistant to any damage. What’s more, this design is much better in cooling performance if you compare it to fin & tube transmission coolers.

B&M has used lightweight aluminum alloy with a black finish to keep corrosion and rust at bay. It comes with an outlet size of ⅜-inch. This cooler is rated for 13,000 BTU. B&M has pressures tested for up to 200 PSI as well.

It comes with a full installation kit and you don’t need to buy extra tools.

That’s not all…!

When you add this cooler to the transmission system of your vehicle, the system will work at its optimum temperature and will also allow your transmission fluid to stay cool even in hot conditions.  The cooler comes with a reduced failure rating for its tube system due to its oven-braised construction that is fluxless and vibration resistant.

This cooler system can monitor any resistance in the flow and control the amount of transmission fluid to go through the self-regulated orifice. With the help of viscosity, any of the thicker ATF is returned to the lube right through a couple of bypass openings in the core that has a stacked-plate design.

It ensures the system’s efficiency by continuously working on maintaining the overall temperatures and keeping the temperature at an optimal level.

B&M 70268
Our rating:4.6 out of 5 stars (4.6 / 5)


  • Better efficiency with a stacked-plate construction.
  • Stronger transmission cooler with better damage resistance.
  • Comes with a hose as well as mounting hardware.
  • All aluminum construction to handle heat and pressure very well.
  • Stack-plate construction for resisting damage and improved cooling.
  • Suitable for towing up to 4000 pounds.
  • Rated for gross vehicle weight of up to 25,000 pounds.


  • The hose clamps that come with it are pretty flimsy.

5 Derale 13504

Here are another plate & fin transmission coolers for you. The Derale 13504 is a premium quality transmission system cooler that features embossed turbulators. These turbulators are inserted in each tube, agitate fluids to ensure an optimal level of heat transfer.

It comes with plastic fin guards and is pretty effective in keeping the entire system cool at all times. The transmission cooler will significantly improve your overall transmission system performance.

The construction of this transmission cooler is pretty sturdy, furnace brazed and features aluminum alloy. If you are looking to up the performance from those fin & tube designs, you need to go for this design cooler.

The unit is suitable for all full-sized vehicles including SUVs and trucks. And they should be used for various mid to lightweight applications or even consistent towing. The cooler will significantly improve the transmission life of your vehicle and prevent any transmission failures associated with heat. The result will be significantly improved shifting performance.

The kit includes full hardware that makes it very easy to install onto your vehicles that come with 0.3125-inch lines for transmission cooler. The installation process itself is pretty simple and won’t take much time either. It is rated for up to 4,500 pounds of towing and can work well with a gross vehicle weight of up to 22,500 pounds.

The temperature of your vehicle’s transmission will remain around 160F to 180F even at 100F ambient temperature. And on a colder day, the temperature of your transmission will go up to a maximum of 103F.

Derale 13504
Our rating:4.7 out of 5 stars (4.7 / 5)


  • Embossed turbulators agitate fluid for maximum heat transfer.
  • The cooling fin guards are made of plastic to keep weight in check.
  • Designed for improving the transmission system significantly.
  • Sturdy construction with furnace-braised design.
  • Rated for towing up to 7000 lbs.
  • Best suited for vehicles up to 22,500 pounds of gross vehicle weight.


  • The hose that is included is a bit too small in diameter

6 Derale 13403

This transmission cooler is also suitable for a variety of towing vehicles as well as full-sized cars, trucks, and vans. It is rated for towing up to 6000 pounds and works well for the gross vehicle weight of up to 22,000 pounds.

The cooler comes with an inbuilt turbulator that agitate fluid to ensure maximum heat transfer. All aluminum construction ensures the cooler can handle the heat from friction pretty well. With sturdy furnace-braised construction, its 19-row cooler construction is tested to deliver quality performance even in high temperatures.

The cooler’s fittings include a -6AN aluminum inlet male o-ring along with a 0.375-inch hose. There are barb adapters also included that will allow you to keep the attachment in place longer.

The transmission cooler can conveniently handle ambient temperatures of up to 115F. In such conditions, the temperature of your transmission never increases over 180F. Therefore, if you own a Jeep with a supercharger, this transmission cooler is a must-have for you.

You might need to go with some extra hose because it comes with only a small-sized hose. Most of the transmission coolers on the market come with smaller sized hoses so it will be convenient for you to go for some additional hose.

But the overall cooling performance of this cooler is very good. Installation is a breeze and keeps the transmission system of your vehicle at a normal temperature for long. Especially on those long trips in high ambient temperatures.

Derale 13403
Our rating:4.5 out of 5 stars (4.5 / 5)


  • The cooler comes with inbuilt turbulators to ensure maximum heat transfer.
  • Aluminum construction to keep the system lightweight and handle heat well.
  • Furnace-braised construction is resilient.
  • Very easy to install with hose and barb adapters included.
  • Works well for vehicles with a gross vehicle weight of 22,000 pounds.
  • Rated for towing up to 6000 pounds.


  • The hose that comes with this transmission cooler is small.

7 Derale 15300

The Derale 15300 is rated for towing up to 7500 pounds and an overall gross vehicle weight of 23,000 pounds. The tube and fin style of this cooler features 16 free-flowing tubes with embossed turbulators.

They have half inch copper tubing and aluminum cooling fins keep them cool. The cooler comes with a full -8AN outlet and inlet also with -8AN half-inch brass bars for a hose to keep it in its position. With this type of construction. The transmission cooler does a pretty fine job to transfer heat.

Your transmission fluid will remain cool and the system will continue to work at its best without any overheating issues even in high temperatures. However, you have to use your current mounting brackets. So before buying it check to see if your mounting brackets are in their best position or not. You will have to wait until you have good brackets in your hand to install your new cooler.

Here’s how you can use it…!

You need to have your brackets already in the palace to use the Derale 15300. As it doesn’t come with any mounting brackets. You have to buy them separately so you can install the cooler right away.

This transmission cooler can work conveniently for different types of towing vehicles as well as full to medium-sized cars. The overall installation of this cooler is not a big deal. Just make sure you have enough hose at your disposal.

Derale 15300
Our rating:4.5 out of 5 stars (4.5 / 5)


  • Regulates the temperature of your transmission system very well.
  • Pretty simple to install in your vans and trucks.
  • It is towing rated for up to 7500 pounds.
  • The cooler is better suited for gross vehicle weight of up to 23,000 pounds.
  • Improved heat transfer abilities with aluminum fins and copper tubing.


  • It doesn’t come with any installation hardware.

8 B&M 70298

The 70298 transmission cooler by B&M is a high-end product to provide your current transmission cooling system with some additional cooling capacity. It is effective for engine oil as well as automatic transmission fluid. Therefore, both these systems maintain their adequate operating temperatures. The system ensures better durability and reliability of your entire transmission system.

The plate construction of this cooler features a fin with a black finish on it. And there are ½ NPT fittings along with a 175F thermal switch as well. The kit also includes a high flowing 12V 7-inch diameter fan that can pull 6-amp per minute. The transmission cooling kit is rated for 200 PSI. It is also backed by B&M with a 1-year warranty.

If you are interested in buying a transmission cooler that can work in hot temperatures as well, you need to go for the best transmission cooler on the market. And this is one of the best transmission coolers because it will keep the overall working temperature of your transmission system inside 180F. It can easily handle high towing burdens along with higher gross vehicle weight.

The cooler is rated towing of 6000 pounds and comes with a gross vehicle weight of 21,000 pounds. It is very easy to install and you don’t have to do much to get the job done. Just make sure you have enough hose for your vehicle.

B&M 70298
Our rating:4.2 out of 5 stars (4.2 / 5)


  • Maintain s transmission system temperature pretty well.
  • A good option for keeping the engine oil cool too.
  • Straight forward installation procedure.
  • No fancy tools required for the installation either.
  • Enhances your engine’s overall durability and resilience as well as that of your transmissions system.


  • Finding the right fittings will be difficult.
  • Very minimal or no installation guidance available whatsoever.

9 Hayden Automotive 526

The 526 transmissions cooling system by Hayden Automotive comes with a fin and plate construction. It has a self-contained fan or cooler combo that allows you to mount the unit remotely. The unit has a very compact design. It means it is not going to take much space to install.

The advanced quality stator fan in this cooler ensures even cooling. You can conveniently control it manually or in thermostatic mode. The overall weight of this cooler is slightly over 5 pounds.

It comes with a towing capacity of 10,000 lbs and it is best suited for a gross vehicle weight of 26,000 pounds. If mounted aptly, this fan kit will go a long way. So it is a high capacity transmission kit that does a fine job even in higher temperatures.

It will make sure the overall operating temperature of your transmission systems doesn’t go above 180F. You don’t have to put in much effort when it comes to the installation either.

But there’s a catch…!

The kit doesn’t come with everything you need for your vehicle. It only includes cooling systems. You will have to purchase the entire hardware kit separately.

And this is where this transmission cooler lets you down, it already has a huge price tag. And even if you don’t get a hardware kit after paying this much, you will consider it to be an expensive option. But it does a fine job when it comes to keeping the entire transmission system cool. And this point is pretty hard to argue against.

Hayden Automotive 526
Our rating:4.5 out of 5 stars (4.5 / 5)


  • Fin and plate construction.
  • The fan and combo are self-contained for mounting remotely.
  • Extremely compact design for easy fitting.
  • The stator fan can evenly distribute cooling.
  • You can operate it manually or with thermostatic controls.


  • Doesn’t come with any hardware for installation.
  • The fan functions of this transmission system are slightly flimsy and you need to do some tweaks but overall the cooler does a pretty fine job in keeping the temperature well in control to prevent wear over time.

10 B&M 70266

The 70266 B&M SuperCooler is a lightweight transmission cooler that only weighs around 3 pounds. But it has a rigid stacked plate construction to keep any damage to a minimum. It is also far better than any rin and tube design in terms of performance.

The cooler is constructed with aluminum alloy and features a black finish. It ensures the coolers remain safe against any corrosions or rust. It is pressure-tested for 200 PSI with a 20,500 BTU rating. The unit is rated for towing up to 4500 pounds.

But that is not all…!

This transmission cooler is not that difficult to install.

But that’s a catch…!

Your purchase of this cooler doesn’t include a hardware or installation kit. So you will have to do some more shopping if you are looking to install this kit into your vehicle.

This transmission cooler can also work pretty well if you are looking to cool and dry the air compressor before it enters the tank. The unit does its job pretty well. As soon as you install this transmission cooler inside your vehicle, you will notice a huge temperature drop of up to 30F. This unit is designed to keep the transmission temperature around 175F which is ideal if you frequently use your vehicle in higher ambient temperatures.

Make sure you don’t bypass your factory cooler because this cooler will work in tandem with the factory cooler to ensure the temperature of your transmission system remains in control. This cooler is an excellent choice for you to use if you own a towing vehicle.

B&M 70266
Our rating:4.6 out of 5 stars (4.6 / 5)


  • Comes with a towing rating of 4500 pounds.
  • Suitable for a gross vehicle weight of around 20,500 pounds.
  • Effortless installation


  • The cooler doesn’t come with any hardware or installation kit.

Best Transmission Coolers Buying Guide

If you are looking for the best transmission coolers, you need to look for some important features here. Different transmission coolers come with different specs to keep them in mind to get the best performance according to your needs and requirements. Here are some important features you need to consider before buying.


There are different types of transmission coolers available on the market. They all have the same purpose but working is slightly different.

  • Tube & fin

This type of transmission cooler is the budget-friendly option and features an S-shaped tube in the middle with finds on the sides. The tubing has the transmission fluid and the fins draw away the heat from the fluid. These are better united for older cars.

best transmission coolers

  • Plate & fin

This design has a higher rating in terms of efficiency if you compare it with the fin and tube. This is because the plate and fin design are much better in looking down a larger quantity of fluid in its aluminum tubes with its aluminum fins. It also doesn’t take much time to do its job and a much better option for modern vehicles.

  • Stacked plate

If we talk about efficiency there is no better option than the stacked plate design. It is made of a series of plates and these plated surround the fluid tubing. This design is better in terms of optimal airflow and contributes towards quicker cooling of the fluid. If you do heavy-duty towing or racing then this transmission cooler is the best.


Another important feature you need to consider is the compatibility of the transmission cooler that you are looking to install with your vehicle. If the cooler is not compatible with the age, usage, controls, and goals of your vehicle, it’s not going to cut it.

Many manufacturers of these coolers make them workable for a specific brand or type of car. You need to check that or you can always go for a universal fit as well. But it must align with your goals and overall usage of your vehicle.


Another important feature to consider here is easy installation. The cooler that you are looking for in your vehicle needs to be very easy to install. You don’t need to spend your entire day to get the installation process completely. Why? Because tweaking it will take even more time. So you need to be careful here.


How fast a cooler can cool down the transmission fluid in your vehicle is of course one of the most important metrics to consider when buying a transmission cooler. It also depends upon the amount of wearing that you put on your vehicle. Of course, you will need a highly efficient cooler that can quickly cool down the fluid when you are buying it for racing or towing.


The purpose of a transmission cooler is to cool down the fluid quickly so it needs to be made of the right kind of materials. Aluminum is one of them and for that reason most of these coolers feature aluminum.


You won’t hesitate to go for a bigger cooler because with a bigger size efficiency will increase, right. The cooler that you are considering buying needs to be compatible with your vehicle and that is a more important thing than size.

GVWR and Towing Rating

GVWR is the gross vehicle weight rating and it is the maximum amount of weight that your vehicle can handle while towing rating is the maximum amount of weight it can two. This rating can range from 10,000 pounds to 30,000 pounds while the towing rating can range from 3500 pounds to 10,000 pounds. With higher numbers, your vehicle needs a more powerful cooler.


One of the best transmission coolers you can buy in the market is the Hayden Automotive 678. This transmission cooler comes with a towing rating of 5000 pounds and a GVW rating of 24,000 pounds.

Installation of this cooler is not a big deal as your purchase will include the entire hardware kit, you need to get it in your vehicle. It is suitable to work with vans, pick-up trucks, and Class C motorhomes. Apart from that, it can also work well with 24 feet travel trailers as well.

The mounting bracket of this cooler comes with pre-drilled holes so you don’t have to spend too much time getting it installed. It can maintain the minimum pressure drop and can ensure proper heat transfer to efficiently keep the temperature under 180F.

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