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  1. Transmission Coolers
  2. Derale
  3. Tube-Fin Cooler
  4. Full-Size Truck
  5. SUV
  6. With 11/32 Inch Hose Barb Inlets
Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class IV - Economy

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

Our Price: $55.55
You Save: 12%
Transmission Coolers

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15-1/4" Wide x 10" 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 IV - Economy part number D12904 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (121)
  • Q & A (0)
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Derale Transmission Coolers

  • Tube-Fin Cooler
  • Full-Size Truck
  • SUV
  • With 11/32 Inch Hose Barb Inlets
  • Standard Mount
  • 15-1/4W x 10T x 3/4D Inch
  • Derale

15-1/4" Wide x 10" tall x 3/4" deep, reliable, all-aluminum tube-and-fin cooler extends the life and improves overall functioning of your vehicle's transmission.


  • 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 full-size cars, trucks and SUVs
  • Imported


  • Inlets: 11/32" hose barb
  • Overall dimensions: 15-1/4" wide x 10" tall x 3/4" deep
  • Core width: 12-1/4"
  • Distance between inlets: 8-3/4"
  • 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.


Replaces HH41014

12904 Derale Dyno-Cool Aluminum Tube and Fin Cooler with Installation Kit

Item # D12904

Installation Details D12904 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class IV - Economy - D12904

Average Customer Rating:  4.6 out of 5 stars   (121 Customer Reviews)

15-1/4" Wide x 10" tall x 3/4" deep, reliable, all-aluminum tube-and-fin cooler extends the life and improves overall functioning of your vehicle's transmission.


Works solidly, much better than the optional stock tranny cooler. It doesn't get temps as low as another one I've had, but it doesn't leak like that one either! Always keeps temps within acceptable range, though at the higher end of acceptable when pulling 7-8k in 110*F outside temps and hills. Be prepared to fabricate a mount for it, not a one size fits all kit!


I was able to mount it but never able to actually install it and hook it up completely.

Etrailer Expert

Brooke M.


Is there anything we can do to help with installation?


Worked good easy hook up

2008 Nissan Titan

i put this unit in my 2008 NIssan Titan pickup. we are going to take a 9000 mile trip this summer pulling a 27 ft HI Lo camper. The instructions were very generic. specific unit instructions would be very helpful. the grill was difficult to get out until i found a Youtube video for that. the hose provided was to short, so I made a run to the parts store. the unit appears to be well made.

Jim K.


we used the cooler in my 08 Titan. we pulled a 27 ft travel trailer thru 28 states and never had any issues

2004 Chevrolet Silverado

I used this cooler on a 2004 Chevy Silverado. The accessories were not needed because I needed longer hoses and fabricated my own mounting. I think the hose clamps and the hoses could be better quality. The cooler does work very well.

2006 Chevrolet Avalanche

Super easy install. With the installation video on Youtube it took out any of the guess work. The hose could stand to be about 3" - 5" longer if you are going to center in the A frame of an older chevy grill (I have an 06 Avalanche. I had to offset to the passenger side to use the supplied hoses) But, you can get a longer hose easy enough. Just ran over the pass and back and no leaks. Looks good so far!


This is a customer service review not a product review.
Leeza J. was very helpful in helping me get everything needed for adding a secondary transmission cooler to my Chevy truck. I ordered 3 different items and the one item was not in stock and I was promised that I would be notified when it arrived. I was notified that the item was in stock 2 days later and I received the package a few days after that. Very good service that impressed me.

2002 Ford F-250 and F-350 Super Duty

Easy install. But hoses need to be longer. I had to go to napa to purchase an extra 3 ft. The hose clamps that were included were limited to the amount of tension that were put on them. They would tighten to x amount then just spin. I had to purchase extra hose clamps that actually tightened.
Impressed overall.

1999 Ford F-150 and F-250 Light Duty

Exactly what I ordered. Quick shipping and all parts needed for installation included! Always easy to find what I need at E-Trailer!


Everthing as described. From ordering to the home delivery, I was informed every step of the way Good old fashion Americian business! The way it should be done.

You guys set the bar high when doing buisness!
Thanks a million!


We're an independent auto and truck repair parts were delivered promptly. Seem to be good quality and fit great on our customers unit thanks..


Dropped transmission temperature buy 25-30 degrees. I would recommend for anyone trying to help out their tranny.

1979 Ford Ranchero

easy installation & works great, good v alue.

2007 Chevrolet Avalanche

works well, wouldn't buy one any smaller than this one.



No issues, good product, thanks etrailer.


Very fast shipping. Everything was there and in pretty decent condition. Would have been perfect, but some fins were bent, though it could have been the delivery company. Definitely recommend

2004 Chevrolet Silverado

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


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


2004 Chevrolet Silverado

1996 Dodge Ram Pickup

Fast shipping, good price!!! Thank you


Great cooler upgrade for my 1997 GMC Yukon! Little delivery damage, but was so easy to bend those fins back to original shape so no worries!
Nice that you had proper dimension measurements online, so it was easy to figure out what kind I can fit in my truck. Complete kit had everything I needed to get it done!
Modified old cooler bracket little bit and that was it. Works great!


Removing the front bumper/grill on my Odyssey was a must! Installation was pretty much straight forward once you confirm the feed, and return connection points. Mounting the actual cooler to the front radiator was the easiest part of the job. My Odyssey made two 650 mile trips pulling 2050 lbs with no problems so I’m very happy with the cooler!


I have always loved etrailer and their service. Once again order another of these coolers. Drop my temp from 240 to 170-190 also remember to order extra hose, the adapter if needed for your vehicle make, mount kits. Love it. Perfect this one is on a 07 GMC Yukon XL always add an extra cooler on your 1500 gmc or chevys they help out so much for them.


Excellent, way better than the WeatherTech rain guards I had on there before.


I just installed this on my chevy avalanche.
the bottom brace around in order to mount to.
The hardest part is getting the hoses on the cooler and over the return line.
I ended up getting a 90 deg quick connection coming from the radiator instead of using the one I got from etrailer. This keeps the hose from bending as much.
Also purchase the installation kit with a hose as you will need an extra hose.
After install I wish I would have went with the next bigger unit which is 10 high instead of 7 1/2 as I had plenty of room.

Show More Reviews

See what our Experts say about this Derale Transmission Coolers

  • Installing Derale Transmission Cooler, # D12904, on a 2008 Honda Pilot
    To install the Derale Transmission Cooler, # D12904, on your 2008 Honda Pilot, you would take the long fasteners provided to mount the cooler. The most efficient place to mount the cooler is between the grille and the AC condenser. The included fasteners look like wire ties and go through the cooler and the component it is mounted to. On the other side, you will place a spacer and then the button lock to hold it in place. The last part of installation is to make the connections with the...
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  • Determining Transmission Return Line To Add Transmission Cooler on 2020 Ram 1500
    On your 2020 Ram 1500, the best way to determine which line is the return line on your transmission is to start the engine while the engine is cold and put the shift lever in drive for 10 seconds. Then return the shifter to park, stop the engine and remove keys. You will then be able to identify the return line by feeling both the supply and return lines because the sending line will be warm and the return line will still be cold.
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  • Where is the Best Place to Mount a Transmission Cooler on a 1967 Ford Galaxie
    The best place to mount an automatic transmission cooler such as # D12904 on your 1967 Ford Galaxie or any vehicle is in between the vehicle grille and the AC condenser core. Here it will get the most airflow and be the most efficient. The second best place is between the AC condenser core and the radiator. And third, between the radiator and fan. I have included a picture that should also help along with a link to our help article on transmission coolers.
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  • Is there a Transmission Cooler Available for a 2008 Dodge Durango and Where Does it Install
    Transmission coolers are not vehicle specific so you will be able to use the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class IV - Economy, # D12904, if it will fit in one of three mounting locations. You will need to measure in the engine compartment of your 2008 Dodge Durango to make sure a cooler will fit. The most efficient mounting point is between the grille and AC condenser core. The next most efficient place is between the AC condenser core and the radiator (25 percent...
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  • How Much Transmission Fluid to Add With Derale Dyno-Cool Tube-Fin Transmission Cooler Kit
    Thank you for the purchase of the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit # D12904. In regards to the amount of fluid, there isn't a set amount to be added, it's on an as-needed basis. The added line means you'll have to put in more than you would if you didn't have the cooler, but the best thing to do really is to put it in a bit at a time and check the levels on the transmission fluid dipstick.
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  • Transmission Cooler Recommendation for 2012 Chevy Tahoe
    Best option is to go with a supplemental cooler installed after your factory cooler as this will maximize the cooling of the fluid. For that your best option is the Derale part # D13504 which is a very efficient and larger cooler that will get your transmission fluid temperatures down into a range that will maximize the life of it. Adding a fan would not be needed as the cooler alone will make a big enough difference.
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  • Transmission Cooler Recommendation for a 2003 Chevy 1500 with a 5.3 Liter Engine
    The Derale Dyno-Cool Tube-Fin Transmission Cooler Kit # D12904 that you referenced would be a good choice for you 2003 Chevy Silverado as long as you have the necessary clearance in front of your radiator and AC condenser. This product measures 15-1/4 inches Wide x 10 inches tall x 3/4 deep. Transmission coolers are not too hard to install. I have installed a couple of them and they were not too bad at all. You may also be interested in purchasing Derale GM Radiator Adapters # D13018 so...
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  • Installing a Transmission Cooler in a 2005 Chevy Tahoe with 5.3 Liter Engine
    All vehicles with an automatic transmission have a factory installed transmission cooler. It is usually located inside the radiator out of sight. The exception seems to be on some CVT transmissions or on certain vehicles where all the lines are hidden. There are lines going to and from the transmission for the fluid. A line goes from the transmission to the radiator and then back out to the transmission. When installing a supplemental cooler the flow will go from the transmission to the...
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  • Recommended Auxiliary Transmission Cooler for a 2016 Ford F-150
    It sounds like you are looking to add an additional transmission cooler to a 2016 Ford F-150 and if that is the case we have some great options, the Derale Series 8000 Plate-Fin Transmission Cooler Kit part # D13504 is what I recommend. The transmission cooler would indeed tie into the return line.
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  • Recommended Transmission Cooler Kit for a 1992 GMC C/K Series Truck
    The Insta-dapt radiator adapter is included with the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit item # D12904. It fits vehicles with 5/16" transmission lines and enters the radiator with a threaded connector. If you do not want to remove the fitting from your radiator you will want to use the Derale Snap-In Radiator Adapter Fitting for GM item # D13035. I recommend purchasing the second adapter. I would be nervous and messing with a fitting that old. This kit also includes an OEM...
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  • Is Derale Series 8000 Transmission Cooler D13502 a Good fit for 2008 Honda Pilot?
    Since transmission coolers are universal fit items, the Transmission Cooler, part D13502, will fit your 2008 Honda Pilot. Transmission coolers are very easy to install. It is mainly a question of reconnecting hoses and tightening clamps, and making sure you have room to mount them. We do have larger transmission coolers than the D13502, and you would simply need to measure to make sure they fit under the hood. Check out the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit, part D12904....
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  • Do the Fittings in Transmission Cooler # D12904 Require Thread Sealed Tape/Sealant When Installed
    Adding thread sealed tape to the fittings in the Derale Transmission Cooler, # D12904, is not necessary, but you can use some as long as it is only on the threads and not on the face of the fitting. You do not want particles getting into the transmission, so you will have to be very careful. Since it is not necessary, I recommend just using the fittings by themselves unless you discover a leak after installation. Then it would be a good idea to add the tape. I do not recommend using a...
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  • Recommended Transmission Cooler for 2004 Chevy 2500HD
    I recommend the Derale 19-Row Stacked-Plate Transmission Cooler Kit, # D13403. This fits most vehicles with the 5/16" transmission lines, but I recommend adding the Derale Snap-In Radiator Adapter Fitting for GM # D13035. This adapter allows you to easily connect the radiator to the transmission cooler. Please note the linked product review and installation videos below along with installation instructions.
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  • Transmission Cooler Recommendation For 2005 GMC Sierra 4.8L
    I recommend Derale Transmission cooler part # D13502 for your 2005 GMC Sierra 4.8L as long as you have the space to mount it. The Transmission Cooler measures 11" wide x 7-1/4" tall x 7/8" deep. Between your vehicle's grille and AC condenser core is the most efficient. The second most efficient location is between the condenser and radiator. The the third most efficient location is mounting the cooler between your engine and radiator. You do need Derale Snap-In Radiator fitting part #...
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  • Transmission Cooler Recommendation for a 1999 Ford F-250 Super Duty with 7.3 Liter Powerstroke
    You can certainly use the Derale 24 Inch Frame Rail Fluid Cooler, # D13225, for your 1999 Ford F-250. You would also need Derale Radiator Adapter Fittings, # D13025, for the 7.3 liter Powerstroke. Any transmission cooler will could essentially be considered a remote mount application. I have included a link to the coolers recommended for your truck and engine. I have also included a link to our transmission cooler FAQ article and a video showing a typical installation. For your truck and...
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  • Recommended Transmission Cooler For 2012 Ford F-450
    When choosing a transmission cooler, the most important thing you want to know is where it will fit so that it will provide the maximum cooling possible. I have attached a drawing that shows the locations typically used for a transmission cooler and where the best location is if possible. As the drawing shows, if you can mount the cooler between your vehicle's grille and the AC condenser core you will gain the greatest efficiency. If your 2012 Ford F-450 is not a diesel, I recommend a...
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  • 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...
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  • What Transmission Cooler do you Recommend on my 2006 Silverado 2500 Duramax/Allison
    I have a good solution for you but I do not have an exact replacement. In this case it will be an upgrade to your current system rather than a direct replacement that is likely to deliver similar results to what you have now. I recommend adding the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit part # D12904 with the Derale Snap-In Radiator Adapter Fitting for GM part # D13035. Here you will use both your current cooler and add a great deal more cooling power to the system to keep...
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  • Transmission Cooler Recommendation for a 2003 GMC Sierra 4x4 1500
    I can tell you that the Derale Transmission Cooler Pan, # D14204, fits most 1982-1999 model 4L60Es transmissions. Some models may require a smaller transmission filter to get it to fit. It will not fit on all models. The overall depth of the pan is 3-5/8 inches and the distance to the the 5/8 inch diameter cooling tubes is 2-1/2 inches from the top of the pan. The exhaust has been determined to be a possible hindrance of installing this pan on models newer than 1999. If there were no components...
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  • Towing Capacity of 2015 Chevy Silverado 1500 Crew Cab 4x4 with 5.3-liter V8 Engine
    The best place to confirm the towing capacity of your 2015 Chevy Silverado 1500 Crew Cab 4x4 with 5.3-liter V8 engine is the printed owner's manual. This will reflect the capacity of your specific pickup with the particular mix of equipment installed on it at the factory, including the 3.42 differential. I reviewed the online trailering guide on the Chevrolet website and at most a properly-equipped 1500 can tow 12,000-lbs. But your 5.3L V8 crew cab 4x4 with 3.42 differential is shown as...
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  • Differences between the Derale Series 8000 Transmission Cooler and the Dyno-Cool Transmission Cooler
    The main difference between the Derale Series 8000 Transmission Cooler, # D13504, and the Derale Dyno-Cool Transmission Cooler, # D12904, is the construction. The Dyno-Cool cooler is a Tube-Fin style cooler has aluminum fins surrounding the tubes. The aluminum fins dissipate the heat from the transmission fluid in the tubes. The Series 8000 cooler is a Plate-Fin cooler. Plate-fin coolers are similar to tube-fin coolers, but they are more efficient. On these coolers the fluid is forced...
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  • Weight Distribution with Sway Control and Transmission Cooler Recommendation for 1998 Ford F150 4.6L
    The Strait-Line Weight Distribution with Sway Control, part # RP66072, you referenced would work very well as a weight distribution and sway control system for pulling your 1987 21 foot Sunline Camper with your 1998 Ford F150. I have included a link below to installation instructions and an FAQ page that you might find helpful. I would strongly recommend you upgrade your transmission cooler also. I would recommend the Derale Transmission Coolers for the 1998 F-150 and F-250 Light Duty...
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  • Most Efficient Transmission Cooler Recommendation
    Derale does not rate their transmission coolers in bTu but if you wanted a cooler that would work very well the Derale Stacked plate cooler # D54012 will be your best option. This is a stacked plate cooler which is the most efficient style by a long shot and is the biggest size we have at 13" Wide x 13-15/16" tall x 2" deep. While this may not be rated in bTu it would easily fit your 29,500 requirement.
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  • Transmission Cooler for 1998 Chevrolet C/K 1500 Pickup Towing 7000-lb Trailer Load
    The good news is that since transmission coolers are not vehicle-specific you are free to install as large a cooler as you have the room to install it. Coolers come in several class ratings depending on their cooling action; I suggest a Class IV cooler like the 11 x 12-inch Derale # 13504 you referenced or the larger 15 x 10 Derale # D12904. For either one you will use hose fitting kit # D13035. Two linked articles will give you lots of good background on transmission coolers and I've...
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