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  1. Transmission Coolers
  2. Flex-a-lite
  3. Plate-Fin Cooler
  4. With 3/8 Inch Hose Barb Inlets
  5. Standard Mount
  6. 11W x 6D x 3/4D Inch
Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting

Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting

Item # FLX400117
Our Price: $161.10
Transmission Coolers

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Great Prices for the best transmission coolers from Flex-a-lite. Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting part number FLX400117 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (6)
  • Q & A (0)
  • Videos (3)
  • Photos
  • Why etrailer?

Flex-a-lite Transmission Coolers - FLX400117

  • Plate-Fin Cooler
  • With 3/8 Inch Hose Barb Inlets
  • Standard Mount
  • Flex-a-lite
  • 11W x 6D x 3/4D Inch

  • Flex-a-lite stacked-plate transmission cooler
  • Ideal for passenger cars
  • Dimpled plate and fin design improves cooling efficiently while minimizing transmission-oil pressure drop
  • Lightweight, durable aluminum construction
  • Overall dimensions: 11" wide x 6" tall x 3/4" deep
  • 17 Row
  • 3/8" Barbed fittings

400117 Flexalite 11" x 6" Transmission Cooler Kit - 17 Row - -6 AN Fittings


Replaces FLX4110

This Product Fits The Following Vehicles

Video of Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting

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

Video Transcript for Flex-a-lite Transmission Coolers Manufacturer Demo

Chris Duke: I'm Chris Duke and today we're talking about how to better cool your transmission with Flex-a-lite's advanced transmission coolers. Now, if you've never thought twice about your transmission cooler, I'm going to show you why you would need one and why Flex-a-lite's high quality coolers are the best choice for you to cool down your transmission.Now if your vehicle came from the factory with one, you might be thinking, "Why the heck do I need another one. Isn't mine good enough" Well, it just depends on how hard you push your vehicle. If you've modified your vehicle to increase performance, or you tow a lot, or maybe you just live in a really hot climate, then you can benefit greatly by adding a Flex-a-Lite transmission cooler.Now if your transmission fluid gets too hot, it can lead to premature wear and eventually failure. And this, you don't want my friends. Now, when the transmission fluid gets too hot, it can't do its job of lubricating, protecting internal components, and operating at top performance.

Pretty much any vehicle that you tow with can benefit from additional cooling.You can also add a Flex-a-Lite transmission cooler in addition to a factory cooler. You just plug the Flex-a-lite cooler in after the factory cooler. Now that you know why you should have one, let me show you the best ones that you can get and why they are the best in the industry.Flex-a-Lite's transmission coolers are in a class by themselves because of their patented, dimple plate technology. We'll dive into that in a second. The transmission coolers are a stacked plate design, manufactured so that their aluminum plates are stacked together, and embrace to form a single unit.

And because they are a hundred percent aluminum, they are lightweight, very strong, and rigid. So strong and rigid that they have a 500 PSI burst strength. In other words, if you've got that kind of pressure in your transmission cooler, you've got bigger problems, but your Flex-a-Lite cooler won't be one of them.These coolers use a patented dimple plate design that keeps the fluid mixed as it flows through the transmission cooler. These strategically located dimples provide better heat transfer and improved cooling. Without this cool tech, a cooler outer layer fluid would form near the to wall and hot fluid would pass through the middle without receiving significant cooling.

As a result, Flex-a-lite's, dimpled plate transmission coolers provide nearly double the heat rejection compared to low cost coolers.The design of Flex-a-lite's transmission coolers also minimizes oil pressure drop. For reference, the oil pressure drop of a low cost transmission cooler is nearly 2.5 times greater than Flex-a-Lite's. This is important because the transmission operates on fluid pressure and you want the least restriction possible. If there's too much drop in transmission fluid pressure, then the clutches and bands inside the transmission could slip and cause damage.Available for a variety of applications, their flanges at the top and bottom allow for an easy mounting solution. Flex-a-lite offers a variety of sizes of coolers to accommodate a variety of applications from small cars to heavy duty pickup trucks that are used for towing.Flex-a-lite's transmission coolers are available with three eighths inch barb fittings or dash six AN.

Three eighths inch barb fittings are ideal for vehicles that use a rubber hose for connection. Other threaded dash six AN fittings are for performance vehicles using braided steel hose.You can also get their transmission cooler that comes with a Flex-a-lite electric fan pre-mounted. You can mount these in front of the radiator, underneath the vehicle, on a roll cage, or even on the back of a race car. Really, you can mount them anywhere you want because they have a built in supply of air flow.When it comes to cooling or transmission in tough environments, Flex-a-lite coolers provide class leading cooling to all demanding applications. Flex-a-lite has been in the performance cooling business for more than 50 years. Their light of advanced transmission coolers raises the bar considerably.

Customer Satisfaction Score:

Customer Reviews

Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting - FLX400117

Average Customer Rating:  4.7 out of 5 stars   (6 Customer Reviews)


I hooked this up myself. I made a bracket out of aluminum flat stock. I did not use the ties.I found a nice spot behind the grill of my Tocoma.. It get direct air flow. I've have yravel.I'm excess of 3500 miles since installing it. No issuies with transmission or warning lights.Did some traveling in the mountains a lot on the highway. So it has performed very well. Only took off a star because of the plastic ties. Not sold on the idea of putting it over the radiator. Gina are fragile, road bumps could damage it over time and. cause leaks in one or the other or both.


Worked great!


I can only review the easy and helpful purchase of the Trans oil cooler. It is being installed as I write this review. The Salesman was quite helpful.

2012 Nissan Armada

Glad I got one



As described


See what our Experts say about this Flex-a-lite Transmission Coolers

  • Transmission Cooler Increasing Towing Capacity
    I would recommend going by your owners manual. If you have the ATF cooler installed, you can haul the 4,000lb trailer. Make sure that your hitch can withstand that load if you do not have the OEM hitch that came with the truck.
    view full answer...
  • Can I Install a Transmission Cooler In Series with My Stock Cooler?
    Yes, in fact the transmission coolers we sell are designed to be supplemental coolers, not direct factory replacements. We typically suggest installing our cooler downstream from the factory cooler. I attached a link to our transmission cooler selection for you to check out. If you can give me the year, make and model of your vehicle, I'd be happy to make some recommendations.
    view full answer...
  • Does Flex-a-lite Transmission Cooler # FLX400117 Come with All Components Needed to Install
    The Flex-a-lite Transmission Cooler # FLX400117 does come with everything needed to install. No other components would be needed.
    view full answer...
  • What Parts Are Included With The Flex-a-lite Transmission Cooler # FLX400117?
    Yes, the Flex-a-lite Transmission Cooler # FLX400117 does include the 3/8" hose and clamps that you see in the picture. Product Contents: 1-17 Row Plate Cooler 1-Section of 3/8" Transmission Hose 4-Hose Clamps 2-Threaded 3/8" Barbed Fittings 4-Foam Pads 4-Plate Cooler Anchors
    view full answer...
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  • What Transmission Cooler do You Recommend for My 2017 Toyota Sienna?
    Typically, tow packages come with customized dash plug ports, a 4-way wiring harness, a 7-way wiring harness, a hitch receiver, and a transmission cooler. These are the standard tow package components that come with many models. With that being said, a transmission cooler extends the overall life of your transmission (especially if you wish to tow the 2.5k-3k trailer often). We only carry coolers for the 3.5L V6 engine. If this is the engine you have, I recommend the Flex-a-lite Transmission...
    view full answer...
  • Will Fluid Need to be Added When Installing Flex a Lite Transmission Cooler
    You will most likely need to add a little transmission fluid after the install of the Flex a Lite transmission cooler part # FLX400117 since most likely you will leak out a little during the install and the cooler will add some volume as well. It's always a good idea to check the fluid level after the install of a cooler like this.
    view full answer...
  • Mounting Hole Dimensions for Flex-a-lite Transmission Cooler FLX400117
    I'd be more than happy to help out! The Flex-a-lite Transmission Cooler # FLX400117 has mounting holes that measure 6-1/4" across and then 2-3/4", 2-7/8", and 2-3/4" side to side as you can see in the attached photo. The 6" measurement you asked about is the height of the coil stack alone (see attached) but when you add the mounting flanges you're looking at 7-1/8" overall. I'm also linking a review video for you to reference as well.
    view full answer...
    Image 1 for
  • Transmission Cooler Size for 2013 Toyota Sienna
    When it comes to choosing a transmission cooler, you would ideally choose the largest cooler that will fit in the available space. Since the recommended spot to install the cooler is directly behind the grill in front of the radiator, you'll need to check that area and see how much room is available. The larger # FLX400117 17-row transmission cooler would provide much more surface area for cooling, so that's what I'd recommend if you have the necessary room (11 x 6 inches) for it. You...
    view full answer...
  • Does 2015 Toyota Sienna SE Need Transmission Cooler Towing R-Pod 177 Camper 2,500 lbs
    I would say it's a really smart idea to install a transmission cooler in your 2015 Toyota Sienna towing a 2,500 lb camper. Would your transmission blow up if you didn't install one? Probably not but you would definitely shorten it's life by not installing one since heat is the number one killer of transmissions over time. If you installed the Flex-a-Lite part # FLX400117 in your van you'd prolong the life of the transmission by a lot.
    view full answer...
  • Choosing a Transmission Cooler for a 2019 Jeep Grand Cherokee
    If you were going to ask for a transmission cooler recommendation for a 2019 Jeep Grand Cherokee then I would recommend the Derale Series 8000 Plate-Fin Transmission Cooler Kit part # D13502 which is going to be the perfect size. The Flex-a-lite Transmission Cooler part # FLX400117 is a good option as well but I prefer Derale to Flex-a-lite. In regards to the class rating, I would not get too caught up in this as it is really just a made up guide we use to try and help consumers choose...
    view full answer...
  • Installing Hoses on Flex-a-lite Transmission Cooler
    The Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting # FLX400117 has the 3/8 inch barbs. Since the hose doesn't fit as tight as you'd like, I recommend using the Derale High-Temperature Replacement Hose for Transmission Applications - 5' Long # D13016 which does have the 3/8 inch inner diameter. When installing the transmission cooler hoses, I recommend leaving the hose out in the sun for a little while to allow it to heat up a little and become more pliable....
    view full answer...
  • Comparing Flex-A-Lite And Derale Transmission Coolers For A 2016 Honda Pilot
    When comparing the Flex-a-lite Transmission Cooler # FLX400117 to the similar Derale Series 8000 Transmission Cooler # D13502, there are very few differences between them. Both have an aluminum construction, include all hardware needed, and are Plate-Fin style coolers. This is where the main difference is though. The Derale # D13502 will have 14 rows and the Flex-A-Lite # FLX400117 will have 17 rows. The only other main difference between them is that Derale uses a thermal paint coating...
    view full answer...
    Image 1 for
  • Compatibility of Derale 8000 Transmission Cooler on 2016 Ford F-150
    For your 2016 Ford F-150, the Derale Series 9000 Plate-Fin Transmission Cooler Kit w/ NPT Inlets - Class I -Extra Efficient has 1/2 inch NPT fittings reduced to 3/8 inch barb. The Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting # FLX400117 also has the 3/8 inch barb fittings and is a great option. Most options have the 11/32 inch barb inlets like the Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient # D13503 or Class...
    view full answer...
  • Trailer Hitch, Transmission Cooler, and Air Springs for 2016 Honda Odyssey
    We do have the trailer hitch receiver, transmission cooler, and air springs for your 2016 Honda Odyssey. And you can order the parts right here as we do in fact ship to Canada so you're all set! So let's start with the trailer hitch and for that the best option for your '16 Odyssey is the Draw-Tite Max-Frame Trailer Hitch Receiver # 75270. The Draw-Tite is the strongest hitch with the best capacities for your Odyssey, and is an easy bolt-on installation that doesn't require any drilling...
    view full answer...
  • Should I Install Air Bags Or Jounce Stopper Springs On My 2014 Toyota Sienna?
    In order to improve the towing experience with your 2014 Toyota Sienna, I recommend the Air Lift 1000 Air Helper Springs for Coil Springs - Rear # AL60732. With your vehicle you likely won't be towing all the time, and this system is perfect for that because you can adjust the bags according to your load and it will not affect your unloaded ride quality. On the other hand, jounce springs like Timbren Rear Suspension Enhancement System # TTORSEN04 could possibly affect your unloaded ride...
    view full answer...
  • Installing a Brake Controller on 2016 Subaru Outback Wagon with Set-Up for Towing Pop-Up Camper
    Yes, we can definitely help with this. To tow a pop-up camper or any trailer with electric brakes you will need the 7-way RV style connector for your 2016 Subaru Outback Wagon. If you do not already have one installed we have everything needed to do so and plenty of help articles and install videos too. You will need: - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, # 118467 - Universal Installation Kit for Trailer Brake Controller, # ETBC7 - No-Drill Mount Bracket,...
    view full answer...

Do you have a question about this Transmission Cooler?

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Joshua S
Video Edited:
Joshua S
Employee Chris R
Video Edited:
Chris R
Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Matthew E
Updated by:
Matthew E
Employee Daron K
Edited by:
Daron K
Employee Jessie B
Written by:
Jessie B
Employee Thomas T
Video by:
Thomas T
Employee Bradley B
Test Fit:
Bradley B

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