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Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy
Derale

Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy

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$47.20
Retail:$61.64
You Save: 23%
Transmission Coolers

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15-1/4" Wide x 7-1/2" tall x 3/4" deep, reliable, all-aluminum tube-and-fin cooler extends the life and improves overall functioning of your vehicle's transmission. Great Prices for the best transmission coolers from Derale. Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy part number D12903 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (132)
  • Q & A (0)
  • Photos

Derale Transmission Coolers

  • Tube-Fin Cooler
  • Mid-Size Truck
  • SUV
  • Van
  • 15-1/4W x 7-1/2T x 3/4D Inch
  • With 11/32 Inch Hose Barb Inlets
  • Derale
  • Standard Mount

15-1/4" Wide x 7-1/2" tall x 3/4" deep, reliable, all-aluminum tube-and-fin cooler extends the life and improves overall functioning of your vehicle's transmission.


Features:

  • Improves functioning and overall performance of transmission
  • Extends life of transmission and prolongs period between necessary fluid changes
  • Cuts down on heat-related failures
  • Agitates fluid with built-in, embossed turbulators for more efficient cooling
  • Constructed of durable, lightweight aluminum
    • Thermal-conductive metal provides excellent transfer of heat
  • Includes:
    • High-temperature, OEM spec hose with stainless steel clamps
    • Nylon mounting rods
    • Insta-dapt radiator adapter
  • Recommended for mid-size cars, trucks and SUVs
  • Imported


Specs:

  • Inlets: 11/32" hose barb
  • Overall dimensions: 15-1/4" wide x 7-1/2" tall x 3/4" deep
  • Core width: 12-1/4"
  • Distance between inlets: 6-1/4"
  • 1-Year warranty


Note: The Derale Insta-dapt radiator adapter fits most vehicles with 5/16" transmission lines, but not all. In some cases, additional fittings or alteration of the OEM lines or hoses may be required for installation.


Perhaps the simplest type of heat exchanger, the tube-fin effectively cools a variety of automotive systems. The concept is simple: Fluid cools as it travels through the core by transferring heat out to the fins. The fins then provide the surface area necessary for sufficient heat exchange to take place, allowing the heat pulled from the fluid to dissipate into the surrounding air. Quick, easy and effective.

Dimensions

Replaces HH41013



12903 Derale Dyno-Cool Aluminum Tube and Fin Cooler with Installation Kit

Item # D12903

Installation Details D12903 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy - D12903

Average Customer Rating:  4.6 out of 5 stars   (132 Customer Reviews)

15-1/4" Wide x 7-1/2" tall x 3/4" deep, reliable, all-aluminum tube-and-fin cooler extends the life and improves overall functioning of your vehicle's transmission.

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Fast shipping, good price!!! Thank you



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Good Product



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see previous review



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Nice



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Have not installed this yet but it looks reel purty



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Excellent product. Fast shipping!



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Great cooler for the money. Very simple to install



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Worked great



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top quality,perfect fit!



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Nice product not easiest to install hoses but overall nice piece.



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good show cost effective wood by again



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Works as described.



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Very good product. easy to install. Thank You



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Great service. Part I ordered was as described on the website and was shipped out quickly.



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WOW, My order came fast, I'll be shopping with them again!



by:

Great for the money free shipping anytime you are pulling a heavy load you should always have this



by:

Got my Tranny Cooler and basically did what they showed on the on line video and had it completted in one afternoon.



by:

Fast Shipping Customer Service is Great. They sent me a list of everything I needed.



by:

Great for the price. Works well on my Honda Pilot and provides more cooling then the OEM cooler.


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See what our Experts say about this Derale Transmission Coolers

  • Best Transmission Cooler for a 2018 Chevy Silverado 4.3L V6
    Since your 2018 Chevy Silverado has the smallest engine of that model year, I recommend the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit item # D12903. This is our largest transmission cooler for the 4.3L V6 engine with dimensions of 15-1/4" wide x 7-1/2" tall x 3/4" deep. This cooler will do a great job of keeping your transmission from getting hot when pulling a trailer with your Silverado or just daily driving. The Derale Cooler is made of lightweight aluminum. I have linked a picture...
    view full answer...
    Image 1 for
  • Parts Needed to Flat Tow 1999 Honda CR-V
    A transmission cooler like Derale # D12903 is intended for a vehicle that is doing the work of towing a trailer rather than for a vehicle that is being flat towed. Your 1999 Honda CR-V can be flat towed with all wheels on the ground whether it is has a 5-speed manual transmission or an automatic transmission. The flat towing preparation procedure is slightly different for each type of transmission but in both cases you'll want to ensure the transmission fluid level is full and that you...
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    Image 1 for
  • Transmission Cooler for 2015 Chevrolet Suburban
    The largest transmission cooler you can fit in front of your AC condenser will give you the most cooling efficiency so I suggest Derale Cooler kit # D12903 along with Hose Fitting kit # D13035 for the 5.3L V8 engine. This cooler measures 15-1/4 wide x 7-1/2 tall x 3/4-inch deep; you will want to check the space in front of your condenser to ensure there is enough room to mount the Derale. The inlets/outlets can point in any direction. You will want to ensure that you can access the transmission...
    view full answer...
  • Recommended Transmission Cooler for 2016 Chevy Silverado 1500
    Transmissions should operate at right around 200 degrees ideally. The 215 degrees is a little concerning as 220 is recognized to reduce power and the life of the transmission, so I do recommend adding a transmission cooler to your truck. I recommend the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy # D12903 to assist in cooling your transmission to keep your truck functioning well.
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  • How to Determine the Transmission Cooler Return Lin on a 1999 For F-150
    The easiest way to determine the return line on your 1999 Ford F-150 transmission is to start the truck, shift into drive but do not go anywhere. After about 15 seconds or so put the truck back in park and apply the emergency brake. Turn off the truck. Out of the 2 hoses attached to the transmission, one should be warmer than the other. The one that is cooler is the return line. It may sound a little too easy but it works.
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  • Available Class III Transmission Coolers for 2018 Ford F-150 with 2.7L V6 EcoBoost Engine
    We offer transmission coolers for your 2018 Ford F-150 with 2.7L V6 EcoBoost engine at several different price points. All are displayed on the linked page. The Derale transmission cooler # D13503 is rated as a Class III cooler. They also offer a slightly smaller and less costly Class III model, part # D13502 and also the larger Class III model # D12903. A slightly less-efficient Class II cooler is offered, part # D12906. For best overall value and performance I recommend transmission...
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  • Transmission Cooler for a 2008 Ford F-150 4.2 Liter Towing 5,000 Pound 5th Wheel Trailer
    The most popular cooler for towing capacities of around 5,000 pounds is # D13504. This cooler is 11 inches wide, 12 inches tall, and 7/8 inches deep. Provided you have space for a cooler, and on a 2008 Ford F-150 you surely do, this cooler will work great for you. I have linked a video review of the cooler, the instructions, and a help article on coolers.
    view full answer...
  • Comparing Plate-Fin and Tube-Fin Transmission Coolers for a 2019 Ford F-150
    Out of the Derale # D13503 and # D12903 I recommend going with the former over the latter on your 2019 Ford F-150. Reason being that the part D13503 is a plate-fin cooler which is more efficient than the D12903 which is a tube-fin cooler. I have attached some helpful articles to help you determine where the best location is to mount the cooler on your F-150.
    view full answer...
  • Best Solution for Lowering Vehicle Temperatures When Towing
    The added stress from trailer towing usually shows up as an increased transmission temperature. I am not sure if the gauge you're referring to is displaying engine coolant temperature or if you have one that shows transmission temperature. We do offer Derale Class III transmission cooler # D12903 for your 5.3L Yukon XL which measures a generous 15-1/4 x 7-1/2. This can be mounted in front of your AC condenser to provide supplemental transmission cooling after the OEM cooler in the radiator...
    view full answer...
  • Transmission Cooler Recommendation for a 2007 Chevy Suburban Towing a 5,900 Pound Travel Trailer
    Adding weight distribution will help to divide the gross trailer weight more equally to all the axles of the Suburban and trailer, but all the weight will still be there. While weight distribution is a good idea for a trailer this size, the best solution, and most economical, is to add a transmission cooler. I recommend the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit, # D12903. It is rated for up to 6,000 pounds gross trailer weight and will help to keep the transmission fluid in...
    view full answer...
  • Transmission Cooler Options For 2014 Toyota Tundra SR5 4.6L
    We have class I # D13611, Class II # D12906, Class III # D12903 and Class IV # D12904 coolers for your 2014 Toyota Tundra SR5 with the 4.6L. I would suggest getting the Class IV just to get the most cooling for the purchase. They all install relatively the same so I've included an installation video to help you do it on your own!
    view full answer...
  • Do I Need to Identify Transmission Cooler lines to Run an Aftermarket Cooler In-Line with Factory
    You will need to determine the flow of the transmission fluid in order to install the aftermarket cooler in-line with the factory. The fluid needs to travel from the transmission, to the factory cooler, to the aftermarket cooler, then back to the transmission. One of the fittings on your transmission should be marked RETURN. Trace this line back to the factory cooler. Disconnect this line from the factory cooler, and reconnect it to which ever end of the aftermarket cooler you choose...
    view full answer...
  • How To Find the Transmission Cooler Return Line From Radiator on a 1993 Chevy C2500
    The best way to determine which line on a transmission cooler is the return line from the radiator is to use the following procedure: 1. Start engine while engine is cold 2. Place transmission shift lever in drive for no more than 10 seconds 3. Place in Park, stop engine, and remove keys 4. Identify the oil return line by feeling both oil lines. The coolest line is the oil return line. On the aftermarket transmission cooler the ports are not input specific or output specific. It is not...
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  • Recommended Transmission and Power Steering Cooler Options for 2002 Ford F-250 with 6.8L V10 Engine
    For your 2002 Ford F-250 with 6.8L V10 engine the most popular transmission cooler option is the Derale Class III model # D13503 which installs with Radiator Adapter kit # D13025. This cooler measures 11 x 8-3/4 x 7/8-inches and it is best installed in front of your AC condenser where it will receive the most direct air flow. A video is included for you. The cooler can be installed with the two connection ports facing in any direction. Another option is to use a pan-style cooler. A pan...
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  • Transmission Cooler Recommendation for 2014 GMC Yukon XL with 6.2 L Engine
    The great thing about transmission coolers is that they're fairly universal in terms of vehicle fitments- the biggest concern is finding the largest cooler that will fit in the forward most available mounting position with your 2014 GMC Yukon XL. The largest cooler we have available for your Yukon XL Denali is the Derale Tube Fin Cooler # D12903 which is 15-1/4" long x 7-3/4" tall-which is the correct size to mount in front of the air conditioner condenser fan (the most preferable spot)...
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  • Recommend Derale Aluminum Tube Fin Transmission Cooler For a Snowmobile
    We do have all aluminum coolers available, they are the 6000 series coolers from Derale. Checkout the Derale Dyno-Cool Tube-Fin, part # D12901, which is an all aluminum cooler. The # D12901 cooler measures 13 inches wide, 5 inches tall, and is 3/4 inches thick. You will need to measure to see if you will have room on your snowmobile to mount the cooler. We do not have an aluminum tube fin cooler as small as the Derale # D13212 cooler that you referenced. For other aluminum coolers in...
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  • Does Transmission Cooler Install for 2004 Ford F-150 Require Hose Fittings
    You will want to use the hose fittings part # D13024 and # D13025 when installing the transmission cooler part # D12903 on your 2004 Ford F-150. They will make the process much easier and allow you to not have to cut and flare any hard lines.
    view full answer...
  • Do Push Rods of Derale Transmission Cooler Kit # D12903 Damage AC Condenser Fins
    Using the push rods of the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit # D12903 will not cause any damage to the condenser of your vehicle. The fins are designed to be slightly bent and not be permanently damaged. Also, no amount of damage to the fins would cause a leak as they only attach to the outsides of the piping of the condensor. If the fins get damaged all they do is prevent the condenser from being able to cool as efficiently.
    view full answer...
  • Towing Capacity and Transmission Cooler Installation on a 1999 Honda CR-V
    I was able to find on the Honda website the specs for your 1999 Honda CR-V. The towing capacity is listed as 1000-lbs. Transmission coolers come in a variety of types and sizes. These items are not vehicle-specific, so you can install the largest cooler for which you have space to mount it. The best location within the engine compartment is in front of the air conditioner condenser as this placement provides maximum air flow and hence best cooling. I have linked two articles that provide...
    view full answer...
  • Transmission Cooler For My 2010 Subaru Outback With Flat 6 Transmission
    We have a number of options for your 6-Cylinder, 2010 Subaru Outback Wagon, provided the transmission hose line diameter matches that of the transmission cooler. The Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy, part # D12903, has transmission hose lines that measure 3/4" in diameter. If the transmission lines on your Outback are the same dimensions, this cooler will work for your vehicle. You will have to measure the dimension of the hoses on your transmission....
    view full answer...

Do you have a question about this Transmission Cooler?


Info for this part was:

Employee DeAnne T
Updated by:
DeAnne T
Employee Daron K
Updated by:
Daron K
Employee Patrick B
Expert Research:
Patrick B
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video by:
Dustin K
Employee Steven C
Installed by:
Steven C
Employee Bradley B
Test Fit:
Bradley B

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