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  1. Transmission Coolers
  2. Derale
  3. Tube-Fin Cooler
  4. Small SUV
  5. With 11/32 Inch Hose Barb Inlets
  6. 13W x 7-1/2T x 3/4D Inch
Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class II - Economy

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

Our Price: $43.73
Transmission Coolers

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13" 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 II - Economy part number D12906 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (130)
  • Q & A (0)
  • Photos

Derale Transmission Coolers

  • Tube-Fin Cooler
  • Small SUV
  • With 11/32 Inch Hose Barb Inlets
  • 13W x 7-1/2T x 3/4D Inch
  • Derale
  • Standard Mount

13" 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.


  • 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 small to mid-size trucks and SUVs
  • Imported


  • Inlets: 11/32" hose barb
  • Overall dimensions: 13" wide x 7-1/2" tall x 3/4" deep
  • Core width: 10-1/8"
  • 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.


Replaces 41011

12906 Derale Dyno-Cool Aluminum Tube and Fin Cooler with Installation Kit

Item # D12906

Installation Details D12906 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class II - Economy - D12906

Average Customer Rating:  4.6 out of 5 stars   (130 Customer Reviews)

13" 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.


Wanted to give my Honda better ability to handle a tow. this baby does the job. Transmission definitely cooler operation since the install. The install was simple and straight forward.

Dan L.


so far so great. Tho sometimes I have to remind the transmission service guys to add a bit more fluid then they are use to.

2009 Audi A6

I purchased this for my C6 Corvette A6 transmission. I did, however, bypass the radiator and only use the transmission cooler for the C6. I purchased and used the Derale Radiator Adapter fitting 259-13035 for both the top and bottom and just capped them off to keep debris out of the reservoir. I also had to make some custom mounting brackets. This is an excellent product and it keeps the tranny in a great temperature range.

2005 Honda Pilot

After one of use on a 2005 Honda Pilot, everything is holding up just fine. The one star less is because of the difficulty in installing it on this particular vehicle. Although this is a universal component, it is MUCH easier to install on pickup trucks. Best of luck with a brand new rubber hose going on with any sort of ease.

Etrailer Expert

Rachael H.


Our installers typically use some transmission fluid to make installing the rubber hose on the Insta-dapt fitting easier.


Very easy install, absolutely no leaks anywhere in the system after putting it into service. I did have to get additional hose for the install due to the location I chose for the cooler (personal preference). I centered it on the bumper side of the radiator to provide the best air flow. Remember to get a quart of transmission fluid to accomodate the larger system volume after the install. I took my grill off to provide the most room for putting the cooler in rather than trying to wedge it between the radiator and grill, made install the nylon fasteners through the radiator and cooler much easier. Should last for many years.

Jeep Grand Cherokee

Can't say anything bad about the unit. It was installed in a Jeep Grand Cherokee that I use to haul trailers occasionally that weigh up to 6000 lbs. So far, I've never overheated the transmission at all, which I attribute to the addition of this cooler. Once again, thanks for a great product.

1999 Toyota 4Runner

Ive got a 1999 4runner that had the unfortunate luck of having the integrated transmission cooler line rupture inside my radiator. needless to say, the transmission didnt agree very well with having engine coolant running through it and finally died out on me. I bought this transmission cooler to isolate the transmission and the engine cooling systems. The cooler arrived a day ahead of schedule, which is always a bonus. I didnt rate it at 5 stars because I havent had a chance to install it yet and see how it performs, but judging by the reviews that I have read so far, the customer service provided and the prompt delivery, I would say that this transmission cooler will keep my truck running for a good long while. Everything pictured arrived in the box and I have no doubt that it will perform as expected. I will definitely recommend this product and this company to my friends!

2008 Chevrolet Silverado

This product is great and installation was not bad at all. Only issue I had was that the GM radiator adaptor should come with this unit when you purchase it for a GM truck. Not as an add-on. Thought I could get it at GM but no go. I Had to work with hoses over 30 min to get them over the fittings even with trans. fluid on the hose and male fitting. So far it looks like trans temp has dropped 30 dg.


The part itself was easy to install and it does what it is designed to do. Only trouble with installation was with the vehicle, I had to remove part of the front cover on my 09' Avalanche to get to it. Also, I wish I had bought a black one to blend in with the rest of the radiator.


The trans cooler was easy to install. I had to go and buy some more hose and mounting screws to make it work but I knew that before I started. The hose was because of where I wanted it mounted. The trans cooler is keeping the transmission about 30 to 40 deg cooler then before.

2006 Chevrolet Colorado

for my 06 colorado with the 2.8l i4. also used the derale trans oil thermostat to help with warmup of trans fluid in winter. trans never gets above 190F now and the engine will overheat (212F) before the trans does. perfect upgrade for a light duty truck/van/car to provide a little bit of cooling at a compact size. very satisfied with the product

2012 Nissan Rogue

I ordered this cooler for my daughter's 2012 Nissan Rogue to fix CVT transmission heating up causing it to into limp mode. When I got ready to install, I found there was no place to connect the hoses to the transmission. The vehicle only had the direct "bee hive" cooler. Install was delayed while waiting to get a "4 tube bee hive" from a different supplier for an additional $114.

Ford Flex

We installed a tow package on our Ford Flex. The transmission cooler was challenging, but everything else went smoothly. The product works perfectly.

2002 Chevy Tracker

Installed on a 2002 chevy tracker with ease. very well made and all parts provided were well thought out for the installation.


Nice inexpensive transmission cooler. Simple installation, although I didn't use the through radiator plastic ties supplied. Drops transmission temperatures well.


The transmission cooler, along with all the other products I ordered from etrailer was an excellent buy. they arrived on time and in excellent condition. The best benefit of ordering from etrailer is the superior customer service. I was even able to talk directly with one of their installers when I had a question.

1999 Ford Ranger

The tranny cooler was really simple to install. Everything you need is in the kit.It took about 45 minutes.
Great product. Delivery was quick.
Thanks to all, no picture at this time, trucks on the road.

2001 Jeep Grand Cherokee

Easy install, works great. Installed on a 2001 Jeep Grand Cherokee. I tow a 19' boat and haven't had any transmission issues since.

2013 Dodge Grand Caravan

Have not installed yet but the product looks great.'s service is so fast it's amazing. Dealt with them before and will not hesitate to deal with them again in the future. Great company.

2007 Honda Pilot

I was able to install this and the PS cooler in one afternoon. I am not a mechanic, but I am fairly handy. Your milleage may vary. All the parts were correct and fit my 2007 Honda pilot fine.


Easy to follow instructions. You will need to remove the front clip to install. Nothing too difficult.

Honda Odyssey

hose provided could have been a little longer, but overall product was a good fit for our Honda Odyssey


Good reliable cooler and really good shipping and tracking!

2007 Chrysler Pacifica

Works great thanks mine got a hole in it and i replaced it with this one.



Best thing iv ever invested in an at a great price


A simply outstanding experience. Great prices and customer service. Outstanding support with the web site videos. A true pleasure to deal with these folks.

2002 Acura MDX

The item is good; exactly what I expect from description. Shipment was fast and it was packed good to avoid damage. Will buy product again in this company. Very satisfied!

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