The Best Transmission Cooler [Buying Guide] (2024)

Are you looking to replace an existing transmission cooler?

Maybe you’re thinking about buying one for a project car.

There are many things to consider when it comes to these simple, but tranny saving devices.

Transmission coolers are a requirement for anyone who plans on towing or if you regularly haul heavy loads. Even off-road fans can benefit greatly from a tranny cooler.

My Chevy 400 even has a tube and fin cooler to help with the heat.

A transmission that has overheated is a very costly repair item. By adding a cooler to your ride, you can prevent overheating, as well as extend the life of your transmission.

If you have ever had to pay for an automatic transmission repair, even a minor repair such as a shift solenoid, you know how expensive automatic transmission repairs can be.

This is even more true if you have one of the newer 6 or 8-speed transmissions.

Types of Transmission Coolers

Most transmission coolers come in three styles:

  • Stacked Plate Cooler – Very efficient but the most expensive model
  • Plate and Fin Cooler – Great efficiency rating and reasonably priced.
  • Tube and Fin Cooler – The most common type, the cheapest, and, not surprisingly, the least efficient

This isn’t to say that a tube and fin cooler is not worth the money. I’ve used fin and tube coolers for decades and they have worked fine for me.

Which is the best transmission cooler for your vehicle?

Let’s take a look at a few options.

What You’ll Find In My Roundup

  1. Best Universal Fit
  2. Best Transmission Cooler For 4L80E
  3. Best Transmission Cooler For 4R100
  4. Best Budget Option
  5. How do I choose a transmission cooler?
  6. Can a transmission cooler be too big?
  7. Does a transmission cooler need a fan?
  8. What is too hot for transmission temp?
  9. My Winner

Best Universal Fit

B&M SuperCooler Automatic Transmission Cooler

  • Rigid stacked-plate design is resistant to damage, and much better at cooling than ordinary fin and tube coolers
  • Constructed from black finished lightweight aluminum alloy for maximum corrosion resistance.Outlet Size:3/8 inch
  • Includes installation kit

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

You may not have heard of the B&M brand, but this universal fit cooler is hard to ignore.

This is a ridged stacked plate design which means that it has superior efficiency when it comes to cooling down the transmission fluid.

Made from an aluminum alloy, this puppy won’t rust, even under the toughest conditions.

I like that this cooler uses viscosity to determine where the tranny fluid will go. Thicker fluid (cooler) is returned directly to the transmission via a bypass tube and thinner fluid is sent to the core.

This comes with a one-year warranty which seems typical for tranny coolers.

Most users see a drop of approximately 20-30 degrees in the temperature of tranny fluid.

The B&M fits every make and model and is easy to install, even if you don’t think of yourself as mechanically inclined.

Pros

  • It’s incredibly easy to install, even for those who are “all thumbs”
  • It drops temperatures by as much as 50 degrees
  • It’s made from aluminum, so it won’t rust

Cons

  • It requires a few extra parts (tubing, self-tapping screws)
  • Some users complain about leaking
  • It may be difficult to find an installation area if you don’t want to place it behind the grille

The B&M SuperCooler takes the prize in my book. Especially for this price! A stacked plate cooler with a universal fit? The only thing left to ask for is to make it free!

Best Transmission Cooler For 4L80E

Hayden Automotive Rapid-Cool Plate and Fin Transmission Cooler

  • Size is 3/4 inch x 11 inch x 11-5/8 inch
  • GVWR up to 30,000 pounds, towing up to 10,000 pounds
  • Patented internal turbulation increases heat transfer with minimal pressure drop
  • Pre-drilled mounting brackets for easy installat

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

Hayden is the company that invented the transmission cooler.

You’ve got to be impressed by their product lineup. Hayden products are also made in the USA, so you can be sure that quality is top-notch.

This is a plate and fin cooler, which makes it middle of the road, both in price and efficiency.

This cooler is made specifically for GM 4L80E transmissions, but a few Ford owners have stated that they used this as well with a few modifications.

This is a fairly large cooler at 11 inches by 11 inches square, but you won’t have any problems mounting it.

Hayden has included everything in the installation kit. Unless it is missing parts, you will find installation is fairly straightforward.

Hayden uses the plate and fin design to keep costs down without sacrificing the efficiency of the unit.

Pros

  • The installation kit comes with everything you need, no extra parts to buy
  • You can install it quickly and easily installation using the pre-drilled mounting brackets
  • It’s also a quality item that is made in the USA

Cons

  • Some users complain about missing pieces in the installation kit
  • The included 11/32-inch hose does not fit every vehicle
  • Some users stated that the included installation hose was too short

Hayden supplies transmission parts and coolers to auto manufacturers. Because of that, this is a quality unit that you can trust to keep your GM 4L80E tranny fluid cool.

Best Transmission Cooler For 4R100

Mishimoto MMTC-F2D-99SL Transmission Cooler

  • Direct fit for the 1999-2003 Ford 7.3L Powerstroke
  • Proven +10°F (+5.6°C) drop in transmission fluid temperature with no additional fluid pressure drop
  • No modification necessary for installation, functions with all stock equipment
  • Mishimoto Lifetime Warra

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

All you Ford Powerstroke owners who want the perfect tranny cooler for your truck, your search is over!

This is a top of the line, 37-row stacked plate tranny cooler made to fit your Ford Powerstroke exactly. No guessing, no adapters, no modifications, just hook it up and go!

Mishimoto has complete confidence in this product. How confident are they?

This tranny cooler comes with a lifetime warranty.

You can’t beat that!

Even though your Powerstroke comes with a tranny cooler, for many people, it is insufficient when you are towing or hauling heavy loads.

Extend the life of your transmission by installing the Mishimoto stacked plate cooler. It will help to stop your transmission from overheating.

While Mishimoto guarantees a drop of at least 10 degrees, most users will tell you that this unit gave them a drop of between 30 and 50 degrees.

Pros

  • It’s made for your Ford Powerstroke, so no adaptors or modifications required
  • It comes with a lifetime warranty
  • It has an almost unbelievable cooling capacity

Cons

  • It’s priced a bit higher than other units
  • Some users complain that the hoses do not last more than a few years
  • The hose clamps could be better quality for the price

The Mishimoto transmission cooler might seem to cost a bit more than others. But compare a lifetime warranty vs a transmission replacement and this will seem like the bargain of the century!

Best Budget Option

Hayden Automotive 402 Ultra-Cool Tube and Fin Transmission Cooler

  • Size is 3/4 inch x 5 inch x 15-7/8 inch
  • Compact and mid-size cars
  • GVWR up to 16,000 pounds, towing up to 2,500 pounds
  • Ultrasonically soldered for durability
  • 100 percentage pressure tes

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

So, you need a transmission cooler, but you don’t have a lot of spare cash lying around? This is the perfect solution.

As mentioned above, Hayden is the original inventor of transmission coolers. You can feel confident knowing that this product is going to do the job.

Hayden also makes their products here in the US for quality assurance.

This is a tube and fin cooler. It’s not the most efficient product, but it still works fine for those who don’t tow 5th wheels or haul cords of wood daily.

I’ve used a similar tube and fin cooler for years and never experienced an issue.

Hayden states that this cooler works well for GVWR vehicles up to 16,000 pounds and towing up to 2,500 pounds. If that sounds right up your alley, this is the cooler for you.

Pros

  • It has a super affordable price
  • The universal fit works with nearly every vehicle on the planet
  • Installation is easy and straightforward

Cons

  • The tube and fin model is not the most efficient
  • The hose clamps are not good quality
  • Some users needed to purchase additional tubing

Need a simple, straightforward trans cooler to prevent overheating? Just want to extend the life of your transmission? Or maybe you don’t have the budget for a more expensive option.

If so, the Hayden Auto-Cool is a viable option.

How do I choose a transmission cooler?

The Best Transmission Cooler [Buying Guide] (1)

Choosing a transmission cooler might seem like a daunting task. But it really isn’t as difficult as it appears.

Use the following three steps to help guide you to the right cooler:

  1. Know the GVWR (gross vehicle weight rating) for your vehicle. You can find this info in your owner’s manual. This might be anywhere between 10,000 pounds and 35,000 pounds. The higher the number, the more efficient (or larger) the cooler should be.
  2. Consider your driving habits. Do you only tow a small utility trailer now and again? Do you think off-roading should be a profession? Do you regularly haul close to your truck’s capacity? Extreme cases require a better trans cooler.
  3. How much do you want to invest? If you don’t have much cash, the universal tube and fin will be your best choice. If you want only the best for your ride, then go with a stacked plate cooler.

Can a transmission cooler be too big?

The Best Transmission Cooler [Buying Guide] (2)

Most people say that you can’t have too big of a transmission cooler. But a large trans cooler mounted in front of the radiator can cause more problems than it solves.

GM actually put out a service bulletin about this.

In very cold climates, some transmission coolers placed in front of the radiator were turning the transmission fluid into gel.

So, if you live in a very cold part of the country, don’t mount the cooler in front of the radiator and you should be OK.

Does a transmission cooler need a fan?

The Best Transmission Cooler [Buying Guide] (3)

This is a chicken and egg question. Some people insist that you do, and others insist that you don’t.

To be honest, I’ve never used a fan. But to be equally honest, I’ve never done heavy towing or hauling.

If you live in parts of the country where it is very hot most of the year, or if you want to be sure that your cooler is doing the job, I recommend a thermostatically controlled fan.

This type of fan only turns on once the cooler reaches a certain temperature.

You could think of a transmission cooler fan as added insurance.

What is too hot for transmission temp?

The Best Transmission Cooler [Buying Guide] (4)

The perfect operating temperature of an automatic transmission is 175 degrees Fahrenheit.

Overheating is considered to occur once the transmission hits 200 degrees. The failure rate will double every 20 degree increase after that.

At 240 degrees, varnish starts to form inside the transmission. At 260, the seals will become hard. At 295, the transmission will slip so badly you will probably stop the vehicle.

If you manage to hit 300, your transmission is now toast.

My Winner

There is nothing wrong with the other coolers that I reviewed here.

But in my opinion, nothing beats the B&M SuperCooler Universal Fit.

I chose it because it offers super-simple installation. Yes, you do need to buy a few extra parts (most users recommend about 4 feet of hose and two 3/8 inch connectors for easier installation).

But you should be able to install this yourself and save a few hundred bucks. Most shops charge between $200-$400 to install a cooler.

Even if you have a factory cooler, you might want to add one of these puppies as well.

Nearly all users state that this cooler dropped tranny fluid temps by a minimum of 20 degrees. Some users said even a 50-degree drop.

A stacked plate transmission cooler is perhaps the best thing you can do for your car, truck, or SUV.

The B&M SuperCooler is the way to do it right for not much cash.

The Best Transmission Cooler [Buying Guide] (2024)

FAQs

What is the most effective transmission cooler? ›

Stacked plate coolers are the most efficient type of transmission cooler. They consist of a series of stacked plates, creating a large surface area for cooling.

How to choose the right transmission cooler? ›

Stacked plate coolers are the most efficient, but tube and fin and plate and fin coolers are also effective and less expensive. Always ensure that the cooler you choose is rated for at least three times the weight of your vehicle or trailer and can handle the amount of heat generated by your transmission.

Is a bigger transmission cooler better? ›

A larger transmission cooler certainly extracts more heat, but unfortunately it's usually located in front of the air conditioning and engine radiator. As a result, this hotter air reduces their cooling performance.

Are all transmission coolers the same? ›

Plate-and-fin coolers work on the same principle as the tube-and-fin-style coolers but are more efficient. Plate-and-fin coolers force fluid through much smaller plates that, like the tube-and-fin cooler, cause turbulation (or agitation) of the fluid.

Where is the best place to put a transmission cooler? ›

Mounting the cooler in front of the radiator and AC condenser is recommended, even though heat from transmission fluid will pass through the condenser and radiator. Mounting positions 4 or 5 may subject the cooler to flying objects. Position 3 should be used with caution, especially if the car has a flexible-blade fan.

Do transmission coolers really work? ›

Increases Transmission Life Span

In such situations, adding a cooler will drop the temperature by 20 to 25 degrees, maintaining your transmission temperature in the 170F range. At this temperature, your transmission could last upwards of 100,000 miles.

Should I flush my transmission cooler? ›

Without cleaning the transmission cooler, you shouldn't even waste time flushing the transmission. The dirt and contaminants in the cooler will simply work their way back into the transmission, neutralizing any benefit your flush may have provided.

What is the correct orientation for a transmission cooler? ›

Cooler Orientation

The Cooler Core can be mounted in any orientation. For optimum flow and performance, it is recommended to have the inlet and outlet pointed horizontally, or vertically up. Note: When oil coolers are fitted, upside-down this can lead to air locks within the system.

What's the hottest a transmission should get? ›

The optimal temperature range for transmission fluid is 175 to 220 degrees. Above that, for every 20 degrees, bad things happen, starting with the formation of varnish at 240 degrees, followed by seals hardening, plates slipping, seals and clutches burning out, carbon being formed, and, ultimately, failure.

Can you have too much transmission cooling? ›

Heat is a huge cause of transmission failures but running too cool is bad also. Just as an engine has to run hot enough the trans has to run hot enough to get rid of any condensation that builds up inside and to keep the viscosity at the correct level for best operation.

Does transmission fluid go through the transmission cooler? ›

All transmissions have a cooling line that runs to the radiator. A separate fluid passage circulates the transmission fluid through a portion of the radiator to cool the fluid.

What is the most common cooler size? ›

Your required cooler size depends on the nature of your trip and the number of people involved. For personal day trips, a 15-25 quart cooler suffices, while a small group or family weekend outing may require a 45-60 quart cooler. For extended group adventures, consider a cooler of 75 quarts or more.

How to choose a transmission cooler? ›

The major thing to consider when choosing a transmission cooler is the type of vehicle you own. Ideally, you want a cooler than fits the make and model of your vehicle. Beyond this factor, think about your vehicle's gross vehicle weight (GVW) rating. Each car has a cooler that aligns with the GVW.

What are 4 types of coolers? ›

Types Of Air Cooler
  • Desert air coolers. A perfect solution for dry climate regions, Desert air coolers are characterised by their large tank capacity, big blower or fan and powerful motor. ...
  • Personal air coolers. ...
  • Tower air coolers. ...
  • Window air coolers.

When should I replace my transmission cooler? ›

You can often tell if your cooler is bad when it starts leaking fluids. Rusting in the cooling lines can occur anywhere, but most often in humid climates. With this problem, you simply need to replace the faulty lines, which are quick fixes for any home mechanic.

What is the best way to cool your transmission? ›

Allowing your vehicle to idle in neutral in heavy traffic, on railroad tracks, or while sitting at a red light significantly minimizes the strain on your vehicle's transmission. This is your transmission's chance to lose intensity by cooling down.

What is the most efficient cooling device? ›

Ductless/Mini-Split systems.

They use an air compressor located outdoors to pull hot air in and blow out dry cool air. NOTE: A conduit hose connects the outdoor compressor to the indoor evaporator and air handling unit. Ductless units are considered the most energy-efficient air conditioning systems on the market.

What is the most efficient cooling fluid? ›

Water is one of the best choices for liquid cooling applications due to its high heat capacity and thermal conductivity. It is also compatible with copper, which is one of the best heat transfer materials to use for your fluid path.

Does coolant run through the transmission cooler? ›

The cooler for the automatic transmissions are placed inside the radiator, the reason behind this is the antifreeze provides the perfect environment. It warms the transmission up with it's cold and keeps it from getting too hot in extreme heat.

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