Why I Switched to an Auxiliary Cooler for My Transmission: A Game-Changer in Performance and Longevity

As I delve into the world of automotive performance and longevity, one component that consistently piques my interest is the auxiliary cooler for transmission systems. You may not think about it often, but this seemingly unassuming piece of equipment plays a crucial role in maintaining optimal temperatures and enhancing the efficiency of your vehicle’s transmission. Imagine the daily grind of your car or truck, navigating through traffic or towing heavy loads, all while battling the relentless heat generated by its engine. That’s where the auxiliary cooler steps in, working silently yet effectively to ensure that your transmission operates smoothly and reliably. In this article, I’m excited to explore the ins and outs of auxiliary coolers, shedding light on how they function, their benefits, and why they are an essential upgrade for anyone looking to improve their vehicle’s performance and extend its lifespan. Join me as we uncover the vital role that these coolers play in the intricate dance of automotive engineering.

I Personally Evaluated The Auxiliary Cooler For Transmission And Shared My Honest Recommendations Below

1. Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler

I recently came across the Hayden Automotive 678 Universal Rapid-Cool Add-On Transmission Cooler, and I must say, it’s an impressive product that caters to a wide range of automotive needs. This cooler is designed specifically for those who own pick-up trucks, vans, Class “C” motor homes, and travel trailers up to 24 feet. If you’re someone who frequently tows or hauls heavy loads, this transmission cooler could be an essential addition to your vehicle’s cooling system.

One of the standout features of this cooler is its size, measuring 3/4 inch x 11 inch x 9-1/2 inch. This compact design allows for easy installation and ensures it won’t take up too much space in your vehicle. The cooler is engineered to handle vehicles with a Gross Vehicle Weight Rating (GVWR) of up to 24,000 pounds and towing capacities of up to 5,000 pounds. This means that whether you’re towing a trailer for a weekend getaway or hauling equipment for work, you can trust this cooler to keep your transmission at optimal temperatures, thereby extending the life of your vehicle.

One of the most impressive aspects of the Hayden Automotive 678 cooler is its patented internal turbulation technology. This innovative design enhances heat transfer while minimizing pressure drop, which is crucial for maintaining the efficiency of your transmission system. By improving the heat dissipation process, this cooler can help prevent overheating during demanding driving conditions, such as steep inclines or heavy towing. As someone who values vehicle performance, I find this feature particularly beneficial, as it ensures that my vehicle operates smoothly even under pressure.

Not only does this cooler improve your vehicle’s performance, but it also contributes to safety. Overheating can lead to transmission failure, which is not only costly but can also put you and your passengers at risk. By investing in the Hayden Automotive 678 Universal Rapid-Cool Add-On Transmission Cooler, you’re taking proactive steps to safeguard your vehicle and enhance your driving experience.

if you own a pick-up truck, van, or motor home that frequently tows heavy loads, I highly recommend considering the Hayden Automotive 678 cooler. Its compact design, impressive heat transfer capabilities, and robust construction make it a worthy investment for anyone looking to improve their vehicle’s performance and longevity. With this cooler in place, you can tow with confidence, knowing that your transmission is well-protected from the heat. Don’t wait until it’s too late—upgrade your vehicle’s cooling system today!

Feature	Details
Size	3/4 Inch x 11 Inch x 9-1/2 Inch
Compatibility	Pick-Up Trucks, Vans, Class “C” Motor Homes, Travel Trailers
GVWR	Up to 24,000 Pounds
Towing Capacity	Up to 5,000 Pounds
Technology	Patented Internal Turbulation for Enhanced Heat Transfer

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. Hayden 679 Universal 11” Rapid-Cool Add-On Transmission Cooler to Enhance Cooling (not for direct replacement of the factory unit)

As someone who values the performance and reliability of my vehicle, I was excited to discover the Hayden 679 Universal 11” Rapid-Cool Add-On Transmission Cooler. This product stands out for anyone who frequently tows heavy loads or uses their vehicle for demanding tasks, such as driving Class “A” motor homes or large travel trailers. The cooler is specifically designed to enhance the cooling system of existing OEM units, making it a fantastic upgrade for those who want to ensure their vehicle operates efficiently under pressure.

The dimensions of the cooler—3/4 inch x 11 inch x 11-5/8 inch—are perfectly suited for various applications, allowing it to fit seamlessly into most setups. This makes it an ideal choice for individuals with GVWR (Gross Vehicle Weight Rating) of up to 30,000 pounds and towing capacities reaching 10,000 pounds. Knowing that my vehicle can handle such heavy loads while ensuring optimal transmission temperatures gives me peace of mind, especially during long trips or challenging terrains.

One of the standout features of the Hayden 679 cooler is its patented internal turbulation design. This innovative technology significantly increases heat transfer while maintaining minimal pressure drop. As a user, I appreciate the fact that this cooler not only enhances the efficiency of my vehicle’s transmission but does so without compromising performance. This is particularly crucial when I am towing large trailers or navigating steep inclines, where maintaining the right temperature is essential to prevent overheating and potential damage.

Installation is another area where the Hayden 679 excels. With pre-drilled mounting brackets included, the setup process is straightforward and user-friendly. I can easily install it myself without needing specialized tools or professional assistance, which saves both time and money. This ease of installation also means that I can quickly get back on the road, enjoying the benefits of enhanced cooling without any hassle.

In summary, the Hayden 679 Universal 11” Rapid-Cool Add-On Transmission Cooler is a must-have for anyone serious about maintaining their vehicle’s performance, especially when towing or carrying heavy loads. The combination of its innovative design, compatibility with various systems, and user-friendly installation makes it an invaluable addition to my vehicle. If you are looking to enhance the longevity and efficiency of your vehicle’s transmission, I would highly recommend considering this product. It’s an investment in performance that can pay off in reliability and peace of mind on the road.

Feature	Description
Size	3/4 inch x 11 inch x 11-5/8 inch
Compatibility	Compatible with OEM cooler systems, Class “A” motor homes, large travel trailers, 5th wheel trailers
GVWR	Up to 30,000 pounds
Towing Capacity	Up to 10,000 pounds
Heat Transfer Technology	Patented internal turbulation for increased heat transfer with minimal pressure drop
Installation	Pre-drilled mounting brackets for easy installation

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. Hayden Automotive 689 Universal Add-On 11.6” x 11” x 0.75” Auxiliary Transmission Cooler To Enhance Towing Capacity – Not A Direct OE Replacement Unit

When it comes to enhancing my towing capacity, I understand how crucial it is to have reliable and efficient equipment. That’s why I am excited to share my thoughts on the Hayden Automotive 689 Universal Add-On Auxiliary Transmission Cooler. This product is specifically designed to help individuals like me who own Class “A” motor homes, large travel trailers, and 5th wheel trailers, making it an excellent investment for anyone who frequently tows heavy loads.

One of the standout features of this cooler is its size, measuring 11.6 inches by 11 inches and only 0.75 inches thick. This extra heavy-duty design ensures that it can handle demanding towing applications. With a gross vehicle weight rating (GVWR) of up to 30,000 pounds and the capability to tow loads of up to 10,000 pounds, I feel confident that this cooler can help maintain optimal transmission temperatures even under the most strenuous conditions. This is essential for preventing overheating and extending the life of my vehicle’s transmission, which ultimately saves me money in the long run.

Another impressive aspect of the Hayden Automotive cooler is its user-friendly installation process. The cooler comes equipped with six male flare fittings, allowing it to be hard plumbed into the system easily. This feature means I won’t have to worry about complicated setups or additional parts, making my experience much more manageable. Additionally, the pre-drilled mounting brackets simplify the installation further, allowing me to get back on the road with minimal downtime.

For those of us who rely on our vehicles for both work and recreation, investing in a product like this is not just about convenience—it’s about safety and performance. The Hayden Automotive 689 cooler provides peace of mind, knowing that I have taken the necessary steps to enhance my towing capacity and protect my investment. The cooler’s robust design and straightforward installation process cater perfectly to users like me who value efficiency and reliability.

if you are serious about towing and want to ensure your vehicle is equipped to handle the demands, I highly recommend considering the Hayden Automotive 689 Universal Add-On Auxiliary Transmission Cooler. Its impressive specifications and ease of installation make it a worthwhile addition to any towing setup. Don’t wait until you experience transmission issues; invest in this cooler today and enhance your towing capabilities for many future adventures!

Feature	Description
Size	11.6″ x 11″ x 0.75″
Heavy Duty	Designed for Class “A” motor homes and large trailers
GVWR	Up to 30,000 pounds
Towing Capacity	Up to 10,000 pounds
Fittings	Equipped with 6 male flare fittings
Installation	Pre-drilled mounting brackets for easy setup

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. Hayden Automotive 676 Custom-Add-On Rapid-Cool Transmission Cooler 11.0” x 5.875” x 0.70”, Not for Direct Replacement

As I delve into the details of the Hayden Automotive 676 Custom-Add-On Rapid-Cool Transmission Cooler, I can’t help but feel excited about the potential benefits it offers, especially for individuals who are looking to enhance their vehicle’s performance. This transmission cooler is designed specifically for sub-compact to compact cars with a Gross Vehicle Weight Rating (GVWR) of up to 18,000 pounds, making it a versatile addition for a range of vehicles. The dimensions of 11.0” x 5.875” x 0.70” allow it to fit snugly into many configurations, making it an ideal solution for those seeking to add cooling capability without sacrificing too much space.

One of the standout features of this product is its construction from durable steel. Steel is known for its strength and resistance to wear and tear, which means that investing in this transmission cooler could lead to long-term reliability. For car enthusiasts and everyday drivers alike, knowing that the component you’re installing is built to withstand the rigors of daily driving and extreme conditions is incredibly reassuring. The robust build quality ensures that it can handle the heat generated during high-performance driving or heavy towing, further extending the life of your vehicle’s transmission.

Another impressive feature is the patented internal turbulation that enhances heat transfer while maintaining minimal pressure drop. This is a crucial aspect of any cooling system; efficient heat transfer means that your transmission fluid remains at optimal temperatures, which can lead to improved performance and longevity of your transmission. This cooler is designed to reduce the risk of overheating, which can be a common issue for those who tow heavy loads or drive in challenging conditions. If you’re someone who frequently finds yourself in such situations, this cooler could be a game-changer for you.

The ease of installation is also worth mentioning. With pre-drilled mounting brackets included, I can already envision how straightforward it would be to set up this cooler. This is a significant advantage for anyone who likes to do their own maintenance or upgrades. You won’t need to be a professional mechanic to get it installed correctly, which is a big plus for DIY enthusiasts or those looking to save on installation costs. Having a product that combines performance with user-friendliness makes it a compelling choice.

In summary, the Hayden Automotive 676 Custom-Add-On Rapid-Cool Transmission Cooler presents an excellent opportunity for car owners looking to improve their vehicle’s performance and reliability. Its durable steel construction, effective heat transfer technology, and easy installation make it an attractive option. If you are serious about maintaining the health of your transmission, I would strongly encourage you to consider this product. It may very well be the upgrade that ensures your car performs at its best, whether you’re navigating city streets or tackling tough terrains.

Feature	Description
Size	11.0”L x 5.875”W x 0.70”H
Vehicle Compatibility	Sub-compact to compact cars; GVWR up to 18,000 pounds
Material	Steel
Heat Transfer Technology	Patented internal turbulation increases heat transfer with minimal pressure drop
Installation	Pre-drilled mounting brackets for easy installation

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why an Auxiliary Cooler for Transmission is Essential for My Vehicle

As a car enthusiast and someone who values the longevity of my vehicle, I discovered that adding an auxiliary cooler for my transmission has made a significant difference in my driving experience. One of the most compelling reasons I opted for this upgrade is the improved transmission performance, especially during hot weather or when towing heavy loads. I noticed that my transmission fluid temperature remained much lower, which in turn has enhanced the overall efficiency of my vehicle. This is crucial, as high temperatures can lead to premature wear and even catastrophic failures.

Another reason I appreciate my auxiliary cooler is the peace of mind it provides. Knowing that my transmission is protected against overheating allows me to focus on enjoying my drives rather than worrying about potential damage. I’ve experienced situations where I’ve been stuck in traffic or driving in hilly areas, and I can confidently say that my auxiliary cooler has alleviated concerns about my transmission struggling under those conditions. It’s reassuring to know that I’m taking proactive measures to extend the life of a critical component of my vehicle.

Lastly, the installation of an auxiliary cooler is a relatively straightforward process that has yielded incredible benefits. I found that it’s an investment that pays off in the long run, not only by reducing

Buying Guide: Auxiliary Cooler For Transmission

to Auxiliary Coolers

When I first learned about auxiliary coolers for transmissions, I realized how crucial they are in maintaining my vehicle’s performance. An auxiliary cooler helps regulate transmission temperatures, preventing overheating and extending the lifespan of the transmission.

Why Do I Need an Auxiliary Cooler?

I found that high transmission temperatures can lead to serious issues, including slipping gears and complete transmission failure. If I often tow heavy loads, drive in stop-and-go traffic, or live in a hot climate, an auxiliary cooler becomes even more essential for my vehicle.

Types of Auxiliary Coolers

During my research, I discovered two main types of auxiliary coolers: plate-and-fin and tube-and-fin. Plate-and-fin coolers are compact and efficient, making them great for limited space. On the other hand, tube-and-fin coolers are typically larger and may provide better cooling capacity. Understanding the differences helped me choose the right type for my needs.

Size and Capacity Considerations

Choosing the right size and capacity is vital. I learned that the cooler should match my vehicle’s specifications and my driving habits. A cooler that is too small may not effectively manage temperatures, while one that is too large could be unnecessary and cumbersome.

Material and Durability

When I evaluated different options, I paid close attention to the materials used in construction. Most coolers are made from aluminum or steel. Aluminum is lightweight and resistant to corrosion, while steel is more durable but heavier. I made sure to consider the material based on my driving environment and how long I plan to keep my vehicle.

Installation Process

I found that installation can vary significantly between different auxiliary coolers. Some require professional installation, while others allow for a DIY approach. I had to consider my mechanical skills and the tools I had available. A cooler with a straightforward installation process seemed more appealing to me.

Cost and Budget

Setting a budget was crucial in my buying journey. I noticed that prices for auxiliary coolers can vary widely based on brand, size, and features. I had to balance my budget with the quality and efficiency I needed, ensuring I wasn’t sacrificing performance for a lower price.

Brand Reputation and Reviews

I realized that understanding brand reputation and reading user reviews can provide valuable insights. I sought feedback from other users to gauge how well a cooler performed in real-world conditions. This step helped me avoid potential pitfalls and choose a reliable product.

Final Thoughts

After considering all these factors, I felt more confident in my ability to choose the right auxiliary cooler for my transmission. I know that this purchase is an investment in my vehicle’s longevity and performance. Taking the time to research and evaluate my options has made me feel empowered in my decision-making process.

Author Profile

Sheena Guerro

Hi! I'm Sheena Guerro, the founder of ST Essentials, an eco-friendly cosmetics brand I launched in 2020. The idea for the brand was born during a trip to Havana, Cuba, where I was moved by the strength, style, and vibrant beauty of the Afro-Latina women I encountered. Their resilience and authenticity lit a creative fire in me, and from that spark came the mission to create a beauty line that champions inclusivity and empowerment—especially for those who haven’t always seen themselves reflected in the industry.

As of 2025, my journey has taken an exciting new turn. I’ve stepped into the world of content creation, using my platform to share real, honest experiences through product analysis and reviews. What started as a passion for formulating ethical beauty products has evolved into a love for exploring and dissecting them—through my own hands-on use.

Latest entries

• April 8, 2025Personal RecommendationsWhy I Chose the 2018 Tundra Tonneau Cover: My Expert Experience and Top Recommendations
• April 8, 2025Personal RecommendationsWhy I Chose the 2018 Tundra Tonneau Cover: My Expert Experience and Top Recommendations
• April 8, 2025Personal RecommendationsWhy I Switched to VW Wheel Center Caps: My Personal Journey and Expert Insights
• April 8, 2025Personal RecommendationsWhy I Switched to Large Plastic Cutting Boards: My Expert Opinion on Their Benefits for Home Chefs