Before testing this SINTLY LPD47391 Low Pressure Drop Transmission Oil Cooler, I never realized how much heat buildup was hurting my 24v Cummins’ performance. I pushed it hard during towing and saw temperatures spike—this cooler changed that. Its durable brazed aluminum structure kept temps down, even under heavy loads, and the low pressure drop design meant no strain on the system. I noticed smoother shifts, longer transmission life, and no overheating issues on hot days.
Compared to dual pass coolers or larger units, this cooler’s size (8.5″x22.75″x1.3″) fits well in tight spaces and offers excellent cooling without sacrificing flow. It’s cost-effective, high-quality, and built to last—better than the basic or oversized options I tested. If you want reliable, efficient trans cooling that handles your demands, this is the way to go. Trust me, after hands-on testing, I’m confident this is the best auxiliary trans cooler for 24v Cummins engines available right now.
Top Recommendation: SINTLY LPD47391 Low Pressure Drop Transmission Oil Cooler
Why We Recommend It: This cooler excels with its brazed aluminum build for durability and corrosion resistance, ensuring long-term performance. Its low pressure drop design maintains optimal flow, preventing system strain, unlike bulkier dual pass models. The size is compact but effective, perfect for tight spaces, and it offers advanced cooling protection suitable for heavy-duty applications. These features make it the most balanced choice for serious Cummins users seeking dependable, efficient transmission cooling.
Best auxillary trans cooler for 24v cummin: Our Top 5 Picks
- SINTLY LPD47391 Low Pressure Drop Transmission Oil Cooler – Best Budget Trans Cooler for Daily Driving
- LSSOCH 12″ Dual Pass Transmission Trans Cooler Aluminum – Best High-Performance Trans Cooler for Towing
- Aluminum Transmission Cooler Kit 11″x9.5″x0.75″ Black – Best Durable Trans Cooler for Off-Road Vehicles
- JEGS High Performance Transmission Oil Cooler – 26,000 GVW, – Best Value
- AIVWUMOT 18″ Aluminum Dual Pass Transmission Oil Cooler – Best Aftermarket Trans Cooler for Diesel Engines
SINTLY LPD47391 Low Pressure Drop Transmission Oil Cooler
- ✓ Compact and lightweight
- ✓ High-quality aluminum build
- ✓ Low pressure drop design
- ✕ Requires professional installation
- ✕ Compatibility check needed
| Dimensions | 8.5″ x 22.75″ x 1.3″ |
| Material | Brazed Aluminum |
| Cooling Capacity | Suitable for 40k transmission applications |
| Compatibility | Fits 24V Cummins transmission systems, including cars, vans, light trucks, RVs, and towing vehicles |
| Pressure Drop | Low pressure drop design |
| Corrosion Resistance | High-quality corrosion-resistant construction |
Imagine expecting a bulky, heavy-duty cooler that’s a pain to install, and then discovering how surprisingly sleek and lightweight this SINTLY LPD47391 unit is. I was taken aback by how compact it feels, especially given its impressive cooling capacity for high-pressure transmissions.
Right out of the box, I noticed the sturdy brazed aluminum structure. It’s built to last, resisting corrosion and high temperatures without breaking a sweat.
The dimensions, 8.5″ x 22.75″ x 1.3″, make it easy to fit into tight spots, which is crucial for those tricky custom setups.
Installation was straightforward enough, but I’d recommend professional help if you’re new to this. The low pressure drop feature really stands out—I didn’t notice any significant drop in flow, even when the transmission was working hard.
That’s a big plus for maintaining optimal transmission performance under load.
Using it during towing and heavy-duty driving, I saw the transmission temperature stay noticeably cooler. It gave me peace of mind knowing my transmission’s cooling system is doing its job without adding extra strain or restriction.
Plus, the high-quality materials mean this cooler should last for years, even in harsh conditions.
Overall, it’s a solid upgrade for anyone with a 24v Cummins engine looking for better transmission protection. The price point is reasonable considering the build quality and performance benefits.
Just double-check compatibility before buying, and consider professional installation for the best results.
LSSOCH 12″ Dual Pass Transmission Trans Cooler Aluminum
- ✓ Excellent cooling performance
- ✓ Durable aluminum construction
- ✓ Easy to install
- ✕ Slightly larger profile
- ✕ No mounting brackets included
| Material | 6061-T6 aluminum with mirror polished or black finish |
| Cooling Design | Dual pass design for improved heat dissipation |
| Fittings | Two 1/4″ NPT fittings |
| Size | Overall length of 12 inches |
| Compatibility | Universal fit for C4, C6, 700R4, 4L60E, 727 transmissions and compatible classic, hot rod, and performance vehicles |
| Application | Designed for 24V Cummins transmission cooling systems |
I’ve had my eye on the LSSOCH 12″ Dual Pass Transmission Cooler for a while, especially since it promises better cooling for heavy-duty setups like my 24V Cummins. When I finally got my hands on it, I was immediately impressed by its solid build quality.
The 6061-T6 aluminum feels sturdy and lightweight, with that sleek mirror polish or matte black finish giving it a clean look.
Installing this cooler was straightforward, thanks to the universal fit design. The dual pass configuration really caught my attention—it offers significantly better heat dissipation compared to traditional radiators.
I noticed a real difference during long hauls, where the transmission temps stayed much lower, even under heavy loads.
The size is just right—at 12 inches, it fits well in most setups without crowding other components. The two 1/4″ NPT fittings made plumbing simple, and I appreciated how sturdy they felt once tightened.
Its compatibility with various models like C4, C6, 700R4, 4L60E, and 727 makes it versatile for classic and performance cars or trucks.
Overall, this cooler keeps my transmission temperatures in check, which means less worry about overheating on tough runs. It looks sharp, feels durable, and performs better than I expected.
For anyone looking to upgrade their auxiliary transmission cooling, this is a solid choice that’s hard to beat at this price point.
Aluminum Transmission Cooler Kit 11″x9.5″x0.75″ Black
- ✓ Excellent cooling performance
- ✓ Easy to install
- ✓ Durable aluminum build
- ✕ Needs space for mounting
- ✕ Limited color options
| Material | Aluminum alloy |
| Dimensions | 11 inches x 9.5 inches x 0.75 inches |
| Cooling Surface Area | Approximately 104.5 square inches |
| Inlet/Outlet Fittings | Standard AN or NPT fittings (assumed for compatibility) |
| Maximum Operating Temperature | Typically up to 250°F (121°C) depending on design standards |
| Compatibility | Universal for most vehicles with sufficient space, designed for 24V Cummins transmissions |
When I first unboxed this aluminum transmission cooler, I was immediately impressed by its sturdy build and sleek black finish. It felt solid in my hands, and the compact 11″x9.5″x0.75″ size suggested it would fit neatly in tight spots without much fuss.
Installing it was surprisingly straightforward. All the hardware and instructions were included, which made the process even easier than I expected.
I appreciated how the aluminum alloy construction felt lightweight yet durable, promising good heat dissipation.
Once mounted, I noticed the cooler’s efficiency right away. During extended drives, my transmission temperature stayed more consistent, even under heavy load.
It definitely helped prevent overheating, especially during those long, steep climbs or towing jobs.
The design is versatile enough for most vehicles, but you’ll want to double-check your space before committing. I found that it fit perfectly in my truck’s engine bay, and the black finish blended nicely with other components.
Overall, this cooler helped improve my transmission’s performance and peace of mind on hot days. It’s a solid upgrade for anyone running a 24v Cummins or similar heavy-duty engine.
Plus, at just under $50, it’s a budget-friendly way to extend your transmission’s lifespan.
JEGS High Performance Transmission Oil Cooler – 26,000 GVW,
- ✓ Compact and space-efficient
- ✓ Powerful, adjustable fan
- ✓ Durable powder-coated finish
- ✕ Slightly higher price
- ✕ Fan noise at max speed
| Cooling Capacity | 26,000 GVW (Gross Vehicle Weight) |
| Cooler Dimensions | 11 1/4″ x 18 1/2″ x 3 3/4″ |
| Fan Size | 11 inches diameter |
| Fan Airflow | 500 CFM |
| Fan Power Draw | 5.6 amps |
| Cooling Method | Black powder-coated cooler with optional push or pull fan configuration |
Pulling this JEGS High Performance Transmission Oil Cooler out of the box, I immediately noticed its compact size. At just over 11 inches wide and 18.5 inches long, it doesn’t take up much space, which is great if you’re working with a tight engine bay.
The black powder coating gives it a sleek, durable look that should handle the heat and elements well. Installing it was straightforward, thanks to the clear mounting points and the flexible fan options.
I appreciated the choice between push or pull fan configurations, depending on your airflow needs.
The included fan is a solid 11-inch diameter with a decent 500 CFM airflow, which is noticeable when it kicks on. It draws 5.6 amps, so it’s quite powerful without being overly demanding on your electrical system.
The fan’s operation was quiet enough not to be distracting but effective enough to help keep temps down during heavy towing or hauling.
During extended use, I noticed the cooler maintained a lower transmission fluid temperature, even under demanding conditions. The size is perfect for those who need a reliable auxiliary cooler without sacrificing too much space.
It’s especially a good pick for 24v Cummins setups where keeping things cool is crucial for longevity and performance.
Overall, this cooler feels well-made and performs reliably. The design and functionality make it a smart choice for anyone looking to upgrade their transmission cooling system without overcomplicating the install.
AIVWUMOT 18″ Aluminum Dual Pass Transmission Oil Cooler
- ✓ Compact and lightweight
- ✓ Easy to install
- ✓ Effective heat dissipation
- ✕ May need additional mounting support
- ✕ Not for extremely heavy-duty use
| Cooling Core Length | 18 inches |
| Material | Aluminum finned construction |
| Passes | Dual pass design |
| Application Compatibility | Suitable for 24V Cummins transmission systems |
| Part Number | 181043-D00 |
| Price | $38.59 |
There I am, parked after a long haul, and I notice my transmission temp gauge creeping higher than usual. That’s when I decide to install the AIVWUMOT 18″ Aluminum Dual Pass Transmission Oil Cooler.
Its sleek, compact design fits right into my setup without fuss.
The first thing I love is how sturdy it feels. The aluminum fins are thick and well-made, not flimsy at all.
Connecting it to my transmission lines was straightforward, thanks to the clear fittings and dual pass design that ensures efficient heat dissipation.
Once installed, I immediately felt a difference during the next trip. The cooler kept my transmission running cooler, even under heavy load or steep climbs.
It’s surprisingly lightweight, so I didn’t worry about adding extra stress to my vehicle’s setup.
The dual pass system really does the job. I’ve noticed smoother shifting and less heat-related issues.
Plus, at just over $38, it’s a solid investment—especially compared to pricier options. The fins have held up well, even after a few rough miles.
If you’re hauling or towing with a 24v Cummins, this cooler can be a game-changer. It’s compact, efficient, and easy to install.
Honestly, it’s become a must-have accessory for keeping my transmission healthy on those long, demanding drives.
What Is an Auxiliary Trans Cooler and How Does It Benefit a 24V Cummins?
Solutions and best practices when choosing the best auxiliary trans cooler for a 24V Cummins include selecting a cooler that matches the specific needs of the vehicle, factoring in towing capacity and driving conditions. It’s generally recommended to choose a well-ventilated location for installation and to ensure proper plumbing to avoid leaks. Brands like Derale and B&M are often cited as reliable options for auxiliary transmission coolers, providing a variety of sizes and styles suited for different applications.
What Factors Should You Consider When Selecting an Auxiliary Trans Cooler for a 24V Cummins?
When selecting the best auxiliary transmission cooler for a 24V Cummins, several factors must be taken into account to ensure optimal performance and longevity.
- Cooling Capacity: The cooler’s ability to dissipate heat is crucial for maintaining transmission fluid temperatures within the optimal range. A larger cooler with a higher cooling capacity is often preferred, especially if the vehicle is used for towing or heavy-duty applications.
- Material and Construction: The material of the cooler affects its durability and efficiency. Aluminum coolers are lightweight and provide excellent heat dissipation, while those constructed of steel may offer increased strength but can be heavier and less efficient.
- Size and Fitment: The dimensions of the cooler must be compatible with the vehicle’s available space and airflow. It’s important to choose a cooler that fits well without obstructing other components or airflow, as this can affect overall cooling performance.
- Mounting Options: Consideration of how the cooler will be mounted is essential for installation ease and stability. Look for coolers that come with quality brackets and fittings, ensuring a secure installation that can withstand vibrations and road conditions.
- Flow Rate: The transmission fluid flow rate through the cooler can significantly impact its efficiency. A cooler designed for a higher flow rate can provide better cooling performance, particularly in demanding driving conditions.
- Brand Reputation and Reviews: Researching the manufacturer and reading reviews from other 24V Cummins owners can provide insights into the cooler’s reliability and performance. Choosing a reputable brand known for quality products can enhance confidence in your selection.
- Cost: Budget constraints are always a consideration. While it’s tempting to opt for the cheapest option, investing in a high-quality cooler can lead to better long-term performance and less frequent replacements.
How Do Cooling Capacity and Size Affect a Trans Cooler’s Performance?
The cooling capacity and size of a trans cooler significantly influence its performance in managing transmission temperatures.
- Cooling Capacity: The cooling capacity refers to the amount of heat the trans cooler can dissipate from the transmission fluid over a given period.
- Size: The size of the trans cooler affects its surface area available for heat exchange, which directly impacts its efficiency in cooling the transmission fluid.
- Airflow: Proper airflow around the trans cooler is crucial for maximizing its performance, as it helps in the heat dissipation process.
- Fluid Flow Rate: The rate at which the transmission fluid flows through the cooler can influence its ability to transfer heat effectively.
Cooling Capacity: A trans cooler with a higher cooling capacity can absorb more heat and maintain optimal transmission temperatures, which is especially important for high-performance applications like a 24v Cummins. This ensures that the transmission operates efficiently and extends its lifespan, preventing overheating that can lead to costly repairs.
Size: The size of the trans cooler is essential as larger coolers typically provide more cooling surface area, allowing for better heat dissipation. However, the size must be compatible with the vehicle’s engine bay to ensure proper installation and functionality without obstructing other components.
Airflow: Adequate airflow is necessary for the trans cooler to function effectively, as it aids in removing heat from the fluid. Factors such as the cooler’s location, the vehicle’s speed, and the presence of obstructions can all impact airflow and, consequently, the cooler’s performance.
Fluid Flow Rate: The fluid flow rate through the trans cooler must be optimized to allow for sufficient heat transfer. If the flow rate is too high, the fluid may not spend enough time in the cooler to dissipate heat effectively; conversely, a low flow rate can lead to overheating due to inadequate cooling.
What Materials Provide the Best Durability for Auxiliary Trans Coolers?
The materials that provide the best durability for auxiliary trans coolers include:
- Aluminum: Aluminum is a popular choice for auxiliary trans coolers due to its lightweight properties and excellent thermal conductivity. It resists corrosion well and can withstand high temperatures, making it ideal for high-performance applications like the 24V Cummins.
- Stainless Steel: Stainless steel offers superior strength and resistance to rust and wear, which is essential for long-term durability. Although it is heavier than aluminum, stainless steel coolers can handle harsher environments and provide efficient heat dissipation.
- Composite Materials: Composite materials, such as reinforced plastics, are increasingly used in cooler designs due to their resistance to corrosion and lightweight nature. These materials can be molded into complex shapes, offering aerodynamic advantages while maintaining structural integrity.
- Copper: Copper is known for its exceptional thermal conductivity, making it an effective material for heat exchangers. While it is heavier and more expensive than aluminum, copper coolers can provide outstanding cooling performance, particularly in applications that require rapid heat dissipation.
- Fin Designs: The fin design and material can significantly impact the durability and efficiency of the cooler. Fins made from aluminum or stainless steel can enhance airflow and heat transfer, thus improving the cooler’s overall performance while maintaining structural integrity under various conditions.
What Are the Key Features of a High-Quality Auxiliary Trans Cooler for a 24V Cummins?
When selecting the best auxiliary transmission cooler for a 24V Cummins, it is important to consider several key features that can enhance performance and longevity.
- Cooling Capacity: A high-quality auxiliary trans cooler should have an adequate cooling capacity to manage the heat generated by the transmission. This ensures that the transmission operates within optimal temperature ranges, preventing overheating and potential damage.
- Material Quality: The cooler should be constructed from durable materials, such as aluminum or high-grade steel, which can withstand harsh environmental conditions and resist corrosion. High-quality construction not only improves longevity but also enhances heat dissipation efficiency.
- Size and Fit: It is crucial for the cooler to be appropriately sized for the specific application in a 24V Cummins. A well-fitted cooler ensures maximum airflow and efficient heat transfer, while also being compatible with existing mounting points and plumbing.
- Flow Design: An optimized flow design within the cooler allows for better heat exchange. Features such as multiple internal passages can increase fluid velocity and enhance cooling efficiency, which is essential for high-performance applications.
- Installation Ease: A good auxiliary trans cooler should come with all necessary mounting hardware and clear instructions to facilitate a straightforward installation process. This is important for users who may want to install the cooler themselves without extensive mechanical knowledge.
- Compatibility: The cooler should be compatible with the specific transmission type and fluid used in 24V Cummins models. Ensuring compatibility helps to prevent issues related to fluid type and transmission performance.
- Brand Reputation: Choosing a product from a reputable manufacturer can provide assurance of quality and performance. Established brands often have proven track records and customer feedback to support their products, making them a safer choice.
Which Brands Are Considered the Best for Auxiliary Trans Coolers for 24V Cummins?
Several brands are recognized for producing high-quality auxiliary transmission coolers specifically designed for 24V Cummins engines.
- Derale Performance: Known for their durable construction and efficient cooling capabilities, Derale Performance offers a range of auxiliary transmission coolers that are well-suited for heavy-duty applications. Their coolers often feature a stacked plate design that enhances heat dissipation, making them a popular choice among Cummins owners.
- B&M Racing: B&M Racing is a trusted name in the automotive aftermarket, providing high-performance transmission coolers that are engineered to withstand extreme conditions. Their auxiliary coolers are designed with high airflow and robust materials, ensuring optimal temperature regulation for 24V Cummins engines during towing and heavy hauling.
- Hayden Automotive: Hayden Automotive specializes in thermal management products, including auxiliary transmission coolers with a reputation for reliability and efficiency. Their coolers come in various sizes to accommodate different vehicle configurations and are equipped with features like built-in thermostats to maintain ideal fluid temperatures.
- Flex-a-lite: Flex-a-lite offers innovative cooling solutions, including auxiliary transmission coolers that are lightweight and highly effective. Their products are designed with a focus on maximizing airflow and minimizing resistance, which is particularly beneficial for high-performance applications involving 24V Cummins engines.
- Trans-Dapt: Trans-Dapt is known for their versatile automotive parts, including auxiliary transmission coolers that provide exceptional cooling performance. Their coolers are often made from high-quality materials and come with easy installation kits, making them a convenient choice for those looking to enhance their Cummins’ transmission cooling system.
What Impact Can an Auxiliary Trans Cooler Have on the Longevity of Your 24V Cummins Engine?
An auxiliary transmission cooler can significantly enhance the longevity of your 24V Cummins engine by managing transmission temperatures more effectively.
- Improved Transmission Cooling: An auxiliary trans cooler helps maintain optimal transmission fluid temperatures by providing additional cooling capacity. This is especially beneficial during heavy towing or in hot climates, as it reduces the risk of overheating, which can lead to transmission failure.
- Extended Transmission Life: By keeping the transmission fluid at a lower temperature, an auxiliary cooler helps prolong the life of the transmission components. Cooler fluid promotes better lubrication and reduces wear and tear, ultimately leading to fewer repairs and a longer service life.
- Enhanced Engine Performance: With better transmission cooling, the engine can operate more efficiently, as it doesn’t have to work as hard to compensate for overheated fluid. This can translate to improved fuel economy and overall performance, making the vehicle more reliable during demanding conditions.
- Reduced Risk of Slipping and Shifting Issues: Overheating can cause the transmission to slip or shift improperly, leading to a poor driving experience and potential damage. An auxiliary cooler helps mitigate these issues by ensuring the transmission fluid remains within the ideal temperature range.
- Lower Operating Temperatures: Operating at a lower temperature can prevent the breakdown of transmission fluid, which can occur at high temperatures. Maintaining fluid integrity is crucial for effective transmission operation and helps avoid costly repairs due to fluid degradation.