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Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury

Derale Radiator Adapter Fittings for Ford, Lincoln and Mercury

Item # D13025
Our Price: $9.79
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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. 1-800-940-8924 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 (16)
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Derale Accessories and Parts - D13025

  • 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

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   (16 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.


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


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.


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.


just what I ordered, fast delivery


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




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...
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  • 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...
  • 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...
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  • 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...
  • 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...
  • 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 Cooler Recommendation For 2011 Ford Escape
    I spoke with Ford and they told me that there would be no problem adding a transmission cooler to your 2011 Ford Escape. You will want to check your owner's manual on recreational towing for any restrictions. The Tech told me the only restrictions might be the space that a cooler needs, but that is always the case when considering a transmission cooler on a vehicle. For your Escape, I recommend the Derale Transmission Cooler, part # D13502. This measures 11 inches Wide x 7-1/4 inches tall...
    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...
  • 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...
  • 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...
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  • What Additional Parts Are Needed to Install Derale Transmission Cooler on 2011 Ford F-150
    You are correct! The Derale # D13504 is a confirmed fit on your 2011 Ford F-150 with the 5.0L engine and you will need to use the # D13025 fitting to complete the installation, but that's the only additional part you need.
    view full answer...
  • Transmission Cooler Radiator Adapter Kit for 2007 Mercury Mountaineer 4.0 V6
    The Derale Radiator Adapter kit # D13025 is intended to connect to 5/8-inch fittings in the radiator of your 2007 Mountaineer. These parts then allow hose connection to the supplementary cooler you're installing, such as Series 8000 Plate-Fin Transmission Cooler # D13504. Please refer to the linked review video that shows this cooler installed. Please send along a photo of the harness end you are referring to and we can assist further.
    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...
  • 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...
  • 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...
  • Radiator Adapter Fitting Needed for a 1997 Ford Expedition
    Here at we have two different radiator adapter fittings for the 1997 Ford Expedition. The adapter that you need will depend on the size of the transmission line on your Expedition. For a vehicle with 1/2 inch-20 thread on the transmission line fitting, use kit # D13024 or for 5/8 inch-18 thread fitting, use kit # D13025.
    view full answer...
  • Recommendation For Transmission Cooling on 1999 Ford F-250 Super Duty With 6.8 Engine
    I would recommend to add an aftermarket transmission cooler to your 1999 Ford F-250 Super Duty to prevent any damage to your transmission. The ideal operating temperature range of your transmission fluid should be 160 to 200 degrees. Adding the cooler will not bypass the existing factory cooler which is located inside the radiator. Adding a cooler provides supplemental cooling to the your factory cooler. Transmission coolers are universal fit items. What you will need to do is find out...
    view full answer...
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  • 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...
  • 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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  • 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...
  • 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...
  • Installing Derale Transmission Cooler on 2012 Ford F-150 With 5.0L V8 Engine
    If you are good mechanically installing the Derale Series 8000 Plate-Fin Transmission Cooler Kit # D13504 with Adapter Fittings # D13025 on your 2012 Ford F-150 with a 5.0L V8 will be relatively simple. I have attached a link to the installation instructions but the basic summary is, after selecting a mounting location, you need to locate the return line to the transmission, which you do by starting the car up, waiting a few minutes and then just touching the transmission lines, and the...
    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 2006 ford F150 5.4 with the Tow Package
    You are on the right track, installing a supplemental transmission cooler to go along with the factory cooler to maximize the cooling of the transmission fluid is a great idea to prolong the life of your transmission. The Derale Series 8000 Plate-Fin Transmission Cooler Kit # D13504 would work great. To make installation easier on your 2006 Ford F-150 you would also want the Derale Radiator Adapter Fittings # D13025. This will thread into the radiator and on the outlet line to provide...
    view full answer...

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