Best Transmission Cooler For Towing 2: Compare 10 Options

#1 · Best Overall

1. A-Premium 8-Pass Cooler

• Weight: 2.4 lb

Best for: Motorhome towing setup.

Why it ranks #1: Its 8-row aluminum kit is listed for towing up to 10,000 pounds, giving it the clearest stated towing capacity among these options.

An eight-pass aluminum tube-and-fin cooler is the defining feature of this A-Premium kit, which is listed for towing up to 10,000 pounds. Its 3/4-by-10-by-15-7/8-inch size gives buyers concrete dimensions to consider when planning space in a towing vehicle or motorhome.

The aluminum construction and eight-pass layout provide the core cooling arrangement, while the included hose mounting kit supports the installation workflow. The listing specifically identifies Class A motorhomes and towing up to 10,000 pounds, giving motorhome owners a stated use case rather than an unspecified towing claim. Its dimensions—3/4 by 10 by 15-7/8 inches—are useful for checking available mounting space, and the product information advises verifying vehicle compatibility before ordering.

Skip it if you tow beyond 10,000 pounds; the Gagsu LPD47391 is listed for vehicles up to 40,000 pounds GVW.

This kit suits a Class A motorhome owner seeking an aluminum eight-pass cooler for towing within the stated 10,000-pound limit. Check its dimensions and vehicle compatibility before settling on an installation location.

Listed on Amazon as: A-Premium Transmission Oil Cooler, Universal Aluminium 8 Pass Tube and Fin, Oil Cooler Kit with Hose Mounting Kit

#2 · 5,000-Pound Towing

2. Hayden 678 Rapid-Cool

• Weight: 1.1 lb

Best for: Moderate-weight towing add-on.

Why it ranks #2: The add-on cooler is listed for towing up to 5,000 pounds and GVWR up to 24,000 pounds, with patented internal turbulation.

Patented internal turbulation increases heat transfer while minimizing pressure drop in the Hayden 678, a compact add-on cooler listed for towing up to 5,000 pounds. Its stated applications include pickups, vans, Class C motorhomes, and travel trailers up to 24 feet.

The 9.5-by-11-inch cooler uses a compact plate-and-fin design, and its flow-path design is described as increasing heat transfer while minimizing pressure drop. Those features make it a supplemental option for the listed vehicle types without presenting it as an original-equipment replacement. The product is expressly an add-on, not a direct replacement for the OE cooler. Its stated towing and vehicle-weight limits help define the use case before installation.

Skip it if you tow over 5,000 pounds; the A-Premium APOC144C is listed for towing up to 10,000 pounds.

For pickups, vans, or Class C motorhomes within its stated towing limits, the Hayden is a compact supplemental cooler. It is not the choice for replacing the factory cooler or exceeding the listed 5,000-pound towing application.

Listed on Amazon as: Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler

#3 · Heavy-Duty GVW

3. Gagsu LPD47391 Cooler

• Weight: 5.99 lb

Best for: Heavy-duty commercial towing.

Why it ranks #3: Its stated 40,000-pound maximum GVW and low-pressure-drop design target heavy commercial trucks, trailers, and towing vehicles.

A maximum 40,000-pound GVW rating sets the Gagsu LPD47391 apart for heavy-duty trucks, trailers, and towing vehicles. Its low-pressure-drop design is intended to limit pressure loss as transmission oil flows through the cooler, an important consideration for a heavy-duty application.

The low-pressure-drop design addresses flow resistance by aiming to minimize pressure loss through the cooler, while the stated 40,000-pound GVW maximum identifies the scale of vehicle for which the kit is intended. The listing includes mounting hardware, supporting the installation process rather than requiring that component to be sourced separately. Its application is specifically heavy-duty, including large commercial trucks, trailers, and towing vehicles, so the GVW figure should guide selection.

Skip it if you need a vehicle-specific cooler; the Mishimoto MMTC-K2-14 is a direct fit for specified Silverado and Sierra V8 trucks.

This kit fits buyers selecting a low-pressure-drop cooler for heavy-duty commercial or towing vehicles up to the stated GVW maximum. Its application is specialized, so use the vehicle’s weight class as the deciding boundary.

Listed on Amazon as: Low Pressure Drop Transmission Oil Cooler LPD47391 4739 40,000 GVW with Mounting Hardware (Black)

#4

4. SINTLY LPD47391 Cooler

• Weight: 5.74 lb

Best for: 40,000-GVW cooler replacement.

Why it ranks #4: This brazed-aluminum low-pressure-drop cooler is listed for heavy-duty use up to 40,000 GVW and measures 8.5 by 22.75 by 1.3 inches.

A brazed-aluminum cooler measuring 8.5 by 22.75 by 1.3 inches gives the SINTLY LPD47391 a defined footprint for heavy-duty installation planning. The listing identifies it as a low-pressure-drop 40,000-GVW transmission cooler and specifies professional installation for buyers without prior experience.

The brazed-aluminum structure is described as corrosion- and high-temperature-resistant, supporting use in the listed heavy-duty application. Its low-pressure-drop design is the central flow-related feature, while the 40,000-GVW maximum identifies the intended vehicle class. The stated 8.5-by-22.75-by-1.3-inch dimensions help with space planning before installation. SINTLY recommends professional installation for people who have not done this work before, making installation experience a practical part of the decision.

Skip it if you need an included mounting-hardware kit; the Gagsu LPD47391 listing specifies mounting hardware.

This SINTLY cooler suits a heavy-duty vehicle within its stated 40,000-GVW application when its dimensions and low-pressure-drop design fit the project. Follow its professional-installation recommendation if you are new to cooler installation.

Listed on Amazon as: LPD47391 Low Pressure Drop 40k Transmission Oil Cooler Kit Compatible with Heavy Duty 40,000 GVW Max with Mounting Hardware

#5 · Direct-Fit Upgrade

5. Mishimoto Silverado/Sierra Cooler

• Weight: 8.3 lb

Best for: Silverado and Sierra V8 owners.

Why it ranks #5: It is engineered for 2014–2019 Silverado and Sierra 1500 V8 trucks, adds 0.65 quarts, and mounts inline with the factory system.

A direct-fit design for 2014–2019 Chevrolet Silverado and GMC Sierra 1500 V8 trucks lets this Mishimoto cooler mount inline with the factory cooling system without cutting or fabrication. That vehicle-specific approach offers a cleaner installation path for owners who tow with those trucks.

The stacked-plate core provides more than 3,000 square inches of cooling surface, and the kit adds 0.65 quarts of transmission-fluid capacity. Those specifications make it a substantial supplemental option for the named truck applications. Its inline arrangement with the factory cooling system and no-cut, no-fabrication installation can simplify the work compared with a universal custom setup. The direct-fit claim is restricted to the listed Silverado and Sierra 1500 V8 model years.

Skip it if you drive a different vehicle; the Mishimoto MMTC-SP-13N is a universal 13-row cooler kit.

This is a focused choice for owners of the specified 2014–2019 Silverado or Sierra 1500 V8 who want an inline supplemental cooler. Its direct-fit benefits do not extend beyond that stated application.

Listed on Amazon as: Mishimoto MMTC-K2-14 Trans Cooler, Silverado/Sierra 1500 V8 2014-19, Silver

#6 · Complete Universal Kit

6. Mishimoto 13-Row Cooler Kit

• Weight: 6 lb

Best for: Universal towing upgrade.

Why it ranks #6: Its 13-row stacked-plate cooler kit includes 50 inches of transmission hose, adapter fittings, a union, and clamps for universal installation.

A 13-row stacked-plate core gives the Mishimoto MMTC-SP-13N a substantial cooling surface for vehicles working hard while towing. Its kit includes transmission hose, adapter fittings, a union, and clamps, enabling a more complete universal installation rather than requiring buyers to source every connection separately.

The 22.85-by-7.10-by-1.25-inch core uses a stacked-plate design, while the supplied 50-inch SAE J1532 hose supports routing between the transmission circuit and cooler. The included 3/4-inch-to-3/8-inch barb adapters, union, and stainless-steel clamps provide connection hardware for a 3/8-inch hose setup. Its universal format suits custom projects, but the 25-by-3-by-11-inch item dimensions are a real packaging consideration when choosing a mounting location.

Skip it if you need a vehicle-specific installation; the Mishimoto MMTC-K2-14 is made for specified Silverado and Sierra V8 trucks.

For a towing vehicle needing a universal stacked-plate cooler and supplied hose connections, this kit offers useful installation components. Choose it only if its dimensions and custom mounting requirements suit your vehicle and available space.

Listed on Amazon as: Mishimoto MMTC-SP-13N Universal 13-Row Stacked Plate Trans Cooler Kit

#7

7. Derale 13740 Dual-Cool

• Weight: 6.1 lb

Best for: Remote fan-assisted cooling.

Why it ranks #7: Two 5-inch electric fans and a 19-row stacked-plate cooler provide a remote, fan-assisted option for transmission-fluid cooling.

Two five-inch electric fans supply airflow to the Derale 13740’s 19-row stacked-plate cooler, making its remote format useful where airflow at the cooler needs active assistance. The cooler is listed for engine, transmission, or power-steering use, offering several fluid-cooling applications.

The stacked-plate core and dual fans combine a heat-transfer surface with supplied airflow, while the remote-cooler format offers flexibility in placement. Its motors are described as sealed, waterproof, dustproof, and IP-68 certified, details relevant to installation conditions around the fan assembly. At 13 by 4.88 by 7.38 inches, the unit has defined dimensions for planning a mounting location. Buyers should account for the electric fans as part of the installation.

Skip it if you want a passive frame-rail cooler; the Derale 13225 uses a two-pass design without listed electric fans.

The 13740 suits buyers seeking a remote cooler with dual-fan airflow for transmission, engine, or power-steering use. Its fan assembly and dimensions make mounting location and powered operation important installation considerations.

Listed on Amazon as: Derale 13740 Hyper Dual-Cool Remote Cooler

#8

8. EVIL ENERGY 6-Pass Kit

• Weight: 2.23 lb

Best for: 5/16-inch line installations.

Why it ranks #8: The universal aluminum cooler measures 15.66 by 7.5 by 0.75 inches and includes a hose rated to 145 PSI working pressure.

A six-pass cooler matched to 5/16-inch-ID transmission lines makes the EVIL ENERGY kit a specific option for vehicles using that line size. Its aluminum-alloy cooler measures 15.66 by 7.5 by 0.75 inches, giving buyers practical dimensions to assess before planning an installation.

The kit’s stated compatibility with most cars depends on having 5/16-inch-ID transmission cooler lines, so line size is the key first check. Its aluminum-alloy cooler uses tube-and-fin construction, with fins that absorb heat from ATF and allow airflow over the cooler. The included CPE hose is rated for 145 PSI working pressure and a temperature range from -40°F to 257°F, helping buyers assess whether the supplied hose specifications suit their setup.

Skip it if you need a direct-fit truck cooler; the Mishimoto MMTC-K2-14 is specific to 2014–2019 Silverado and Sierra 1500 V8 trucks.

For a vehicle with 5/16-inch-ID cooler lines, this kit combines a six-pass cooler with hose pressure and temperature specifications. Confirm the line size and make room for its stated dimensions before choosing it.

Listed on Amazon as: EVIL ENERGY 5/16 in Transmission Oil Cooler Kit, 6 Pass, Black

#9

9. LSSOCH 18-Row Cooler

• Weight: 2.79 lb

Best for: Dual-pass universal cooler.

Why it ranks #9: Its 18-row, dual-pass aluminum cooler holds 0.6 quarts and includes two 1/4-inch NPT fittings, but provides no towing-capacity figure.

An 18-row, dual-pass layout gives the LSSOCH 562DSL-18 a defined cooler configuration for universal vehicle projects. Its two 1/4-inch NPT fittings and pre-drilled mounting flanges support connection and mounting planning, while its stated 0.6-quart fluid capacity is a useful system detail.

The satin-aluminum cooler has two holes on one side with a partition, forming the listed dual-pass arrangement. Two 1/4-inch NPT fittings are supplied for connections, and pre-drilled flanges provide mounting points that can simplify positioning on a vehicle. The cooler holds 0.6 quarts of fluid, a practical capacity detail to consider when planning the transmission system. The listing recommends professional installation, so this universal format may suit buyers comfortable arranging a custom setup.

Skip it if you need a specified heavy-duty GVW rating; the Gagsu LPD47391 is listed for up to 40,000 pounds GVW.

This cooler suits a universal project where its dual-pass layout, fittings, and pre-drilled flanges match the installation plan. Its listing recommends professional installation, and the stated 0.6-quart capacity should factor into system planning.

Listed on Amazon as: Universal Oil Cooler 562DSL-18 18" Oil Cooler 2 Dual Pass Transmission 2 Holes 1/4" NPT 18 Rows Barb Fittings Universal

#10

10. Derale 13225 Frame Rail Cooler

• Weight: 1.5 lb

Best for: Frame-rail cooler installations.

Why it ranks #10: The two-pass frame-rail design uses 1/2-inch copper tubing and aluminum cooling fins, but the listing gives no towing or vehicle-fit rating.

Embossed turbulators agitate fluid inside the Derale 13225’s tubes to support heat transfer, while its two-pass design routes fluid through the frame-rail cooler. Copper tubing expanded into aluminum fins completes the cooling structure for buyers planning a frame-rail installation.

The two-pass layout and embossed turbulators work together to move fluid through the cooler while agitating it inside the tubes, a feature the listing connects to heat transfer. Copper tubing expanded into aluminum cooling fins provides the heat-exchange structure, and extruded plastic guards protect the fins. Its frame-rail format makes placement a specific installation consideration, so buyers should plan around that mounting location and the cooler’s routing needs.

Skip it if you need active fan airflow; the Derale 13740 includes two five-inch electric fans with its remote cooler.

The Derale 13225 suits buyers planning a frame-rail fluid-cooler installation who value a two-pass path and turbulators. Its mounting location is the key boundary, so confirm the frame-rail layout suits the vehicle.

Listed on Amazon as: Derale 13225 Frame Rail Fluid Cooler