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Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury

Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury

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Quickly and easily install your new transmission cooler without having to go through the hassle of cutting and flaring lines. Fittings are designed to work specifically with your vehicle's radiator. 1-800-496-5010 to order Derale accessories and parts part number D13025 or order online at Free expert support on all Derale products. Great prices and Fastest Shipping for Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury. Accessories and Parts reviews from real customers.
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  • Reviews (15)
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Derale Accessories and Parts

  • Transmission Coolers
  • Radiator Adapters
  • Derale

Quickly and easily install your new transmission cooler without having to go through the hassle of cutting and flaring lines. Fittings are designed to work specifically with your vehicle's radiator.


  • Connects radiator to transmission cooler quickly and easily - no cutting or flaring lines


  • 5/8"-20 Inverted flare fittings
  • 1-Year warranty

13025 Derale Ford/Lincoln/Mercury Radiator Adapter - 5/8-20 Inverted Flare
Hidden Hitch # HH41417
Hayden Automotive # 395

Item # D13025

Video of Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Derale Radiator Adapter Fitting for Ford, Lincoln and Mercury - D13025

Hi, there. I'm Michael with Today, we're gonna take a quick look at these Derale radiator adaptor fittings. These are 5/8 inch by 20 inverted flare fittings. These are going to make it much easier and quicker for you to get your new transmission cooler installed on your Ford, Lincoln, and Mercury truck or SUV's radiator. You're not gonna have to worry about cutting and flaring your lines with these.

These will just plug right onto your lines and make it much easier for you to get that new transmission cooler installed. These are a brass construction. You can see they've got this black finish to them. So they're gonna be nice and sleek and discreet. It should blend in really well with the rest of your system to make it, so you're not gonna have an eyesore or anything when you're looking under the hood.

These are designed specifically to work with your Ford, Lincoln, and Mercury truck and SUV's. So if you are wanting to get your new transmission cooler installed without having to cut and flare those lines this is gonna be a great kit for you. So that's gonna complete our look for today. Again, I'm Michael with Thanks for watching..

Customer Satisfaction Score:

Customer Reviews

Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury - D13025

Average Customer Rating:  4.5 out of 5 stars   (15 Customer Reviews)

Quickly and easily install your new transmission cooler without having to go through the hassle of cutting and flaring lines. Fittings are designed to work specifically with your vehicle's radiator.


with these fittings and transmission oil cooler on my 2000 Ford F350 superduty powerstroke diesel has lowered my temps by 15 degrees.


I have a 99 Ford F250 4WD 7.3 diesel with 191,000 miles. I am on my 4th transmission. I pull a horse trailer once a year to Colorado or Wyoming from E Texas on an elk hunt. Other than that, maybe a camper or horse trailer hauled to my deer lease 100 miles away. I finally added a temp gauge to the last one. Now I was seeing that my tranny was running around 205 just pulling my trailers up a small grade around my county. Outside temp around 90. I replaced the original Ford cooler with one from Ford. Same results. I did research on my own and stumbled on to and articles of the Derale 8000. I had this put on by my radiator man. He wanted to mount it above the Ford cooler to get max airflow. He had to fabricate some brackets and use some other hose connectors as the ones furnished didn't fit right. Not a problem for me as this thing has finally solved my problems. I ran the same route with my horses loaded in the trailer(est 6000# total wt). The temp gauge registered 170 to 175. That is a drop of 30 to 35 degrees. I now feel confident when I go to Colorado in a few weeks that I won't be broke down on side of road with overheated tranny and buying another tranny when I return. Etrailer shipped product very fast. I am overly happy regardless of it not just fitting perfect.


I installed the Derale D13503 in series with my existing factory installed auxillary cooler for added protection on my Ford Explorer Sport Trac. With the Sport Trac tranny having the reputation for overheating failure, I took the cooling up a notch! I tow a 7X14 enclosed v-nosed trailer, and now I am protected! It was a very easy install, and the included hardware made it pain-free :-)


As a returning coustomer I can say all my dealings with atrailer have been great.
Great product, price, shipping and the very best coustomer service.
Product fit perfect and preformed as expected.
Will be back in the future when I need products etrailer sells
Walter G.


Recommended for the transmission cooler install .... Did not see where it was needed.


Does not work on 99 F250 7.3L. The flare sides of the fittings are to long and deep to use with the existing cooler and fittings.


Great product at a good price , makes adding a trans cooler easy.
fast shipping too.



Just what I needed.Got it in a couple of days.


I like it will buy again


100% accurate. Fast response and delivery. Thank you.


Great product. Easy to install. Very Fast Shipping! Would buy From Again. Thanks!


just what I ordered, fast delivery



Great customer service


See what our Experts say about this Derale Accessories and Parts

  • How to Add Transmission Fluid After Installing Transmission Cooler on a 2003 Ford Explorer
    I wasn't sure why your transmission fluid can only be filled by a dealer. Your 2003 Ford Explorer uses one of two possible automatic transmissions used on Ford Explorers from 1997 to 2010 and a lot of other vehicles within that same time frame. So I checked the owners manual and found out that it doesn't have a dip stick to check the fluid so you would not be able to add any. Basically what you would have to do is have a Ford technician perform the transmission cooler installation. Whether...
    view full answer...
  • Is Larger Transmission Pan Needed if Installing Supplemental Transmission Cooler on 2002 Ford F-350
    No, you will not have to install a larger transmission pan if you added a supplemental transmission cooler though you may need to add more transmission fluid. This is because the core of the new cooler and the hose to add additional capacity. But a larger pan is not needed.
    view full answer...
  • Where is the Derale Adapter Fitting Used?
    This Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury, # D13025, the male threaded end of the fitting goes into your vehicle's radiator and is a thread perfect fit so there is no leaking. The female end of the adapter attaches to the line you removed from the radiator that runs to your transmission. The other end of each fitting is a hose barb where a rubber hose slides over. The hose is then held in place with a hose clamp. One rubber hose will run to your transmission...
    view full answer...
  • Where Does Derale Transmission Cooler Fittings # D13025 Install
    When installing the Derale transmission cooler fitting adapters # D13025 on your truck the one end screws onto the male fitting that is on the transmission line that normally threads into the radiator and the other threads into the radiator where the fitting used to go.
    view full answer...
  • Special Fitting Needed to Install Supplemental Transmission Cooler on a 2011 Lincoln Navigator
    You are correct. Fitting # D13025 threads into the radiator on your 2011 Lincoln Navigator so you will not have to cut or flare the metal lines to install a supplemental cooler. A cooler such as # D13503 includes the hose, clamps, and hardware to mount it so the fitting # D13025 is the only other part you'd need. They are the appropriate size to match the lines to/from the transmission. The fluid will flow from the transmission, into the stock cooler located inside the radiator, then...
    view full answer...
  • Transmission Cooler Recommendation for Bypassing Factory Cooler of 2008 Ford Explorer
    It is possible to bypass the transmission cooler of your 2008 Ford Explorer's radiator and run just a supplemental cooler. For that the Derale Cooler part # D13503 would work well as this is a pretty large cooler with dimensions of 11" Wide x 8-3/4" tall x 7/8" deep. The part number # D13025 comes with fittings that will attach to your current transmission lines. Since you'd need two of the female connectors you'd have to order a quantity of two of these. Then you'll be able to put these...
    view full answer...
  • How Difficult is it to Install a Transmission Cooler on a 2012 Ford F-150
    Transmission coolers are fairly simple to install requiring just a bit of mechanical aptitude and some basic tools. If I had to rate the process on a scale from 1 to 10 with 1 being easy and 10 being hard, I would have to say about a 5. I have attached an install video for you. The process to install the cooler will not be the same as the attached video for your truck but very similar as the process will only differ slightly. As long as you have 11" wide x 12" tall x 7/8" deep of space...
    view full answer...
  • Recommend Transmission Cooler for 2004 Ford Explorer
    For your 2004 Ford Explorer the best way to pick out a transmission cooler is to go with the largest one you can fit in front of your radiator. A very popular option is the part # D13503 which measures 11" Wide x 8-3/4" tall x 7/8" deep. You will want to use the fitting part # D13025 to make installing the cooler a bit easier. You will want to run the fluid through your factory cooler and then to the supplemental cooler to maximize the cooling effect.
    view full answer...
  • Parts Needed to Install a Transmission Cooler in a 2000 Ford F-150
    You will also want to use the Derale fitting part # D13025 with the Derale transmission cooler part # D13504 as this will allow you to install the cooler without having to cut or flare any metal lines. I attached an install video and a help article on transmission coolers for you to check out as well.
    view full answer...
  • Supplemental Transmission Cooler Recommendation for a 2001 Ford F-150
    Factory coolers are often times adequate at best for non-towing applications. For a cheap insurance policy I would add an additional one to your 2001 Ford F-150 since you basically can't over cool a transmission. The cooler you can keep the fluid the longer the transmission will last. A very popular option that would work well for you would be the Derale part # D13614 that you referenced. You would also want the fittings # D13025 to allow the installation of the cooler to be a bit easier...
    view full answer...
  • Transmission Cooler Recommendation for a 2003 Ford Expedition
    Installing a supplemental transmission cooler in your 2003 Ford Expedition would be an excellent idea since it will prolong the life of the transmission. The way to pick out one is to go with the largest cooler that will fit the available space in front of the radiator/AC. The part # D13503 is a very popular choice that would work well for you. The correct fittings you would want are the part # D13025. This will thread into your radiator and onto the metal line so that you don't have...
    view full answer...
  • Transmission Cooler Recommendation for a 2011 Ford Escape
    I found the expert answer you referenced where Jeff said to check the owners manual for restrictions on towing. He meant that you should check to make sure your vehicle is rated for towing the trailer you are planning on towing from a weight capacity point of view. There would be no restrictions on installing a transmission cooler aside from the available space on your vehicle. You would want the to route the transmission fluid from your factory cooler in your radiator to the aftermarket...
    view full answer...
  • How to Install an Aftermarket Transmission Cooler with a Factory Transmission Cooler
    Yes, the Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets part # D13502 can be used as an additional transmission cooler for your 2009 Ford Explorer. I recommend placing the cooler after the factory transmission cooler (radiator). Yes, you will want to use the male barb fitting in the Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury part # D13025 for this. 1) Disconnect the return transmission cooler line from the radiator. 2) Install the male D13025...
    view full answer...
  • Transmission Cooler and Adapter Fitting for 2012 Ford Expedition
    You have to measure inside diameter. In most cases the two sizes are 3/8 and 5/16 inch especially on a vehicle like yours. Instead of using those adapters though we have the part # D13025 which will fit in place of the fittings on your radiator to connect to the cooler lines of a cooler like the part # D13503 which would work great. The hose that comes with this is 5/16 inch.
    view full answer...
  • Does Installing Transmission Cooler on 2003 Ford Expedition Require Special Fittings
    For some vehicles we do have fitting adapters that thread into the radiator so that you'll have a barb fitting for the lines of the transmission cooler to attach to. We do not have any for your 2003 Ford Expedition though. Check out the install video I attached for the Derale part # D13503 on a very similar 2001 Ford Explorer and you'll see how we installed it without needing the adapters.
    view full answer...
  • Recommended Transmission Cooler For 1999 Ford F150 With A 5.4L Engine
    With your 1999 Ford F-150, you are right at the max weight for a 5th wheel trailer with your truck. If you plan on taking it into the mountains, I recommend adding a transmission cooler like the Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient # D13503. This will help your transmission to stay cooler when working so hard. For this installation, I recommend the Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury # D13025 confirmed to...
    view full answer...
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  • DIY Installation of Transmission Cooler for 2006 Ford F-250 and F-350 Super Duty
    Yes, the transmission cooler is a fairly easy-do- it-yourself installation. For your 2006 Ford F-250 or F-350 with a 5.4 liter engine, you can purchase the Derale Radiator Adapter Fittings, # D13025 to ease installation. This way you can avoid cutting the original transmission line and flaring the cut ends. For an at-home installation I would allow 2-1/2 to 3 hours or more for the installation. Before ordering you should measure the available space in front of your radiator or air conditioning...
    view full answer...
  • Radiator Adapter Fittings Needed for a 2004 Ford Explorer XLT 4.0 L iter V6
    The correct Ford/Mercury radiator adapter for your 2004 Ford Explorer is the Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury, item # D13025. This adapter is designed to fit 5/8 inch inverted flare fittings. The Derale Radiator Adapter Fittings for Ford and Lincoln, item # 13024, is designed to fit 1/2 inch -20 inch inverted flare fittings.
    view full answer...
  • Transmission Cooler Recommendations for a 2002 F-350 with the 7.3L Diesel
    Transmission fluid should run below 200 degrees Fahrenheit. At 240 degrees you definitely need to make some sort of change to reduce the temperature. I would first recommend having the transmission checked by a qualified automotive technician to be sure it is performing properly. This will assure you that no damage has been caused to the transmission and you will not be stranded. Installing a transmission cooler will not reverse any damage that may have already been caused. If you find...
    view full answer...
  • Transmission Oil Coolant Return Line Location and Transmission Cooler for a 2000 Ford F-250
    I spoke with a local Ford dealership and found out that the return line from your factory cooler is indeed the one that is run to the rear of the transmission on your 2000 Ford F-250. You are correct, it is recommended that you install a transmission cooler in the return line of the factory transmission cooler. I would recommend the Derale Cooler, part # D13105, as the transmission cooler for your F-250. You will need a Derale Radiator Adapter Fitting for Ford, Lincoln and Mercury,...
    view full answer...
  • Is Derale Radiator Adapter Fitting # D13025 Needed To Install Transmission Cooler on 1999 Ford F-250
    You will need the Derale Radiator Adapter Fittings for Ford, Lincoln, and Mercury, # D13025, which will allow you to connect to the return line of the factory transmission cooler. Part # D13025 allows you to connect to transmission return line without flaring the line when installing on your 1999 Ford F-250 Powerstroke. Installing the cooler behind the front grille, but in front of the radiator will provide the greatest cooling efficiency. You will want to measure a mounting location for...
    view full answer...
  • Transmission Cooler Routing Recommendation on a 2002 Ford Super Duty Truck
    Yes, you could use the Derale Radiator Adapter Fittings for Ford, part # D13025, to allow you to use Derale Series 8000 Plate-Fin Transmission Cooler Kit, part # D13504, with the factory cooler that is on your 2002 Ford Super Duty truck. You would want to route the Derale cooler after the factory cooler. By that I mean you would want to run the transmission coolant line from the transmission, to the factory cooler, then to the # 23785, and finally back to the transmission cooler. Routing...
    view full answer...
  • 2001 Ford F-350 Transmission Cooler Recommendation
    My recommendation would be to supplement your current transmission cooling system with an aftermarket transmission cooler. For your 2001 Ford F-350 I would suggest the Derale Transmission Cooler part # D13504. This part will require an adapter fitting part # D13025 for installation. Transmission coolers are not vehicle specific, however to optimize efficiency you would want to use the largest transmission cooler available, and mount in the optimal place on your vehicle. The most efficient...
    view full answer...
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  • Is it Better to Replace Existing Transmission Cooler or Add Derale Auxiliary Cooler 2003 Ford F-250
    Using a supplemental cooler in place of your factory cooler in your 2003 Ford F-250 is a huge benefit, however, ideally you will want to run both your factory and also a supplemental cooler for optimum performance. Supplemental transmission coolers also work better than coolers that are integrated into your radiator system. My research shows that the transmission cooler in your truck is located below the radiator which typically gets a lot hotter and does not cool as well as a supplemental...
    view full answer...
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