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Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient

Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient

Our Price: $69.99
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Transmission Coolers

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11" Wide x 8-3/4" tall x 7/8" deep, efficient heat exchanger will prolong the life of your transmission and improve its overall performance. Specifically designed for vehicles with late-model, electronic overdrive transmissions. Great Prices for the best transmission coolers from Derale. Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient part number D13503 can be ordered online at or call 1-800-940-8924 for expert service.
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Derale Transmission Coolers

  • Plate-Fin Cooler
  • Mid-Size Truck
  • SUV
  • Van
  • With 11/32 Inch Hose Barb Inlets
  • Standard Mount
  • 11W x 8-3/4T x 7/8D Inch
  • Derale

11" Wide x 8-3/4" tall x 7/8" deep, efficient heat exchanger will prolong the life of your transmission and improve its overall performance. Specifically designed for vehicles with late-model, electronic overdrive transmissions.


  • Prolongs life of transmission
  • Improves overall performance
  • Prevents heat-related failures
  • Has furnace-brazed aluminum construction and 3/4" wide turbulator plates for more efficient cooling
  • Includes complete mounting kit, OEM spec hose with stainless steel clamps and Insta-dapt radiator adapter
  • Recommended for full-size cars, trucks and SUVs


  • Inlets: 11/32" hose barb
  • Overall dimensions: 11" wide x 8-3/4" tall x 7/8" deep
  • Distance between inlets: 10-1/4"
  • Mounting dimensions: 8" tall by either 5-1/4" or 6-3/4" wide
  • Hose length: 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.

One of the more popular cooling systems available, the radiator-style, plate-and-fin heat exchanger provides increased surface area so that fluids can spread out along the finned chambers to cool faster. In addition to the increased surface area, this cooler also features turbulator technology, whereby fluids are agitated continuously, not only to facilitate heat transfer, but also to prevent any undesirable drop in pressure.


13503 Derale Series 8000 Plate and Fin Heat Exchanger with Installation Kit
Hidden Hitch # HH41310
Hayden Automotive # 678

Replaces HH41310

Item # D13503

Installation Details D13503 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient - D13503

Average Customer Rating:  4.7 out of 5 stars   (800 Customer Reviews)

11" Wide x 8-3/4" tall x 7/8" deep, efficient heat exchanger will prolong the life of your transmission and improve its overall performance. Specifically designed for vehicles with late-model, electronic overdrive transmissions.

2010 Jeep Liberty

Thanks for shipping so fast. the response time was impressive!

Below is a picture of the install of my Derale trans cooler (13503) installed in my 2010 Jeep Liberty.

I did not install with the inlet/outlet on the bottom due to thinking that with a plate and fin type cooler air might get trapped in other end. I mounted it horizontal and put the inlet flow on the bottom to assure that any air gets purged. Odd thing about this trans is that there is a bypass valve on the lines that is thermally operated. The flow to the coolers is bypassed until a specific oil temp is reached. Then flow is allowed to go to the cooler(s). This is done because the trans cooler is completely independent of the radiator. There is no thermal exchange between the trans fluid and the engine coolant. With the transmission fluid bypass valve in operation it is not possible to reduce trans temp below a preset level (or nearer ambient temp) because the thermostat valve simply turns off flow to the cooler(s).
In a conventional setup the coolant flows all the time and there is no by-pass. Trans fluid is kept from dropping in temp by the engine coolant which will actually put heat into the trans coolant if the engine coolant is warmer. Chrysler has no thermal exchange with the engine coolant so they thermostatically control flow to keep the trans from operation at a too low temp.
In short, in my vehicle I can’t reduce the trans temp below the thermostat setting, But I can assure that the temp of the trans can never be too hot.

I also mounted the trans cooler on brackets I made. I was uncomfortable pushing the rods thru the radiator and the air conditioning and factory trans cooler. The added mass of the Derale trans cooler may have been a little too much clamped onto the radiator. I tapped into the original hose with a 3/8 double barb fitting and double clamped all connections.

Also below is a exploded parts view showing the by pass valve on the trans lines which directs trans fluid back to the trans and by passes the cooler(s) until the trans gets to a specific temp. It is item #3.

John G.


still working great!

Don W.


Nice discussion John, thx. Did you have over heating problems prior to cooler install. I have a 2011 Liberty that overheats any time I use it off road on hills in the summer....the Jeep dealer told me that they all do this...I wonder if its actually the bypass thermostat?

John G.


Hi Don, My Jeep has never overheated either engine or trans. I have never heard of them being prone to overheating either. If you suspect the inline thermostat on the coolant line I think that would be easy to check simply by feeling the lines and seeing if the line is returning hot trans fluid without going up front to shed some heat. I added the cooler because I put a trailer hitch on and just wanted to make sure that the trans would stay in the proper operating temp range. Are there a lot of bugsdebris in the trans or engine radiators? Is the thermostat cycling properly? Any pinched hoses? If the engine coolant is too hot it may be a pinched hose. Check the temp of the inlet hose versus outlet hose while the engine is running. If the return line is at the same temp as the outlet hose the radiator is not shedding the heat adequately. Cooling problems can be a little tricky but a little detective work can usually solve it.

2010 Chevrolet Suburban

My teenage son and I installed this on our 2010 Suburban in about 2hrs. This was to supplement the tiny, stock external cooler. The video was very helpful. We did not have to cut the plastic as in the video. There was enough room for the hoses and fittings with no kinks. The transmission was running hot, 190-200 degrees with no trailer and up to 220 degrees with a trailer on level ground. The transmission never got above 155 degrees, with no trailer, after this cooler. I can't wait to tow now. I am confident the temps will stay at or below 200. This is just what I needed for my lifted Suburban and travel trailer.


This does not fit a 16 Pilot Touring. The only option is the OEM trans cooler (500.00).

Etrailer Expert

Jenny N.


I know that installing transmission coolers can be difficult. I wanted to ask how yours was not a fit on the 2016 Honda Pilot Touring? I also wanted to confirm that your engine size and what speed transmission that you have?



Because I have the touring model with the 9 speed transmission.

Etrailer Expert

Jenny N.


I do see now what happened. The transmission coolers that we carry are meant to work with the 6 speed versus the 9 speed transmission.


Works great! Easy install. Looks good! 1990 Ford Bronco!

1995 Chevrolet Silverado

I always enjoy my experience buying from etrailer. Troy my sales associate was very knowledgeable about the product and ensured I had all the parts i needed to complete my install. On most online sales transaction the sales associate is done when the order is placed, not so at etrailer, troy followed up with me to ensure i got all the products i bought.

Installation was easy as etrailer has very good videos, makes me look like a pro, in my case I utilized the video on the chevy suburban to provide the basics for my silverado installation. The difference between the two is the silverado front grill snaps out and i did not have to drop the entire front cap. ALso had to fashion a mount for the cooler to support it to the A post. I just used two bolts and locknuts together with the two pieces of the bendable metal mounts (D13002). see photo.

I took my trailer out this past weekend to test out the cooler. My transmission runs at least 20 degrees cooler while towing my 8000lb 5th wheel trailer. Max temps were at 160 deg. with air temps at 91 degrees, and high humidity in florida, typically this would be in the low 180’s rolling at 60 mph. transmission felt smoother while changing. I have a performance tune on my truck. Accelerating off the on ramps did make the transmission temp rise above 160 to around 165 then it fell back to around the 160 mark. It started raining heavily and the outside temps dropped to the 80’s and the transmission temp dropped to the 140’s.
Normal driving around town with no hitched load in stop and go traffic with outside temps hovering around 95 with high humidity (feeling more like 103). here in tallahasse my transmission runs at around 140. I just checked my owners manual and my transmission oil and filter is past due for changing. i will get that done and see if anything changes. all in all this product works for me.
Thanks etrailer!!!

2007 Chrysler 300

This cooler is working perfectly. It gives me piece of mind when I'm towing my old travel trailer. I didn't use the plastic ties that come with the product but instead mounted it with aluminum frame material from the hardware store. I was disappointed that the kit did not come with the adapter I needed to install it onto the transmission fluid lines on my Chrysler 300. I had to obtain the fitting from a salvage yard. The instructions were helpful.

2010 Honda Odyssey

The D13503 transmission cooler was a fairly straightforward DIY installation on a 2010 (3rd gen) Honda Odyssey. Watch a video or two on and you should be able to figure everything out. Two issues came up. First, it is not trivial to get the hose pushed securely onto the nipples of the cooler or the vehicle. Readers should thoroughly lube the inside of the hose and the outside of the nipple. (I suppose a tight fit is good, just be prepared to apply force and be patient!) Second -- and this is why the product only gets 4 stars from me -- the head of one of the plastic mounting rods broke off. No extras are supplied, so I figured out a zip-tie solution. It leaves me nervous about the strength of the remaining three, but the installation seems secure for now.

Potential DIYers should also note that you are likely to break some of the body panel retainers (aka "clips") during disassembly of your vehicle's front end. (Not surprising on my 95,000 mile van; they were brittle.) Be prepared and locate a source for replacements ahead of time.

Overall, this product seems well-designed, is offered at a great price from etrailer, and has the potential to lengthen the life of your transmission even when not towing.

2016 Honda Odyssey

I installed this on a 2017 Honda pilot. I didn't like the mount option shown in the video that covers 3/4 of the cooler by direct mounting to the back of the bumper beam. I used two M6 x 1 x 20mm, one M6 x 1 x 30mm bolts, one M6 x 1 lock nut, two washers, one 1/2" nylon spacer, one 10" piece of zinc plated steel, and multiple zip ties to fabricate a mount using the existing mounting locations in front of the radiator. I also notched one corner of the mounting flange to allow it to clear a portion of the air dam. With this mounting location, nearly all of the cooler is exposed to clean air at the front.

2014 Nissan Pathfinder

The cooler is well built and the included hardware are high quality. I installed it on a 2014 Nissan Pathfinder with CVT. I have the factory external cooler but in a Texas summer, it just wasn't enough. I added this cooler in line. My reasoning: the factory cooler has a thermostat bypass valve (the little metal box the transmission lines go into), so to allow the heater and bypass valve to work without constantly cycling. here is how I connected everything. Hot fluid comes from the transmission to the factory cooler via the top hose. It then goes through the factory cooler or bypasses via the valve depending on fluid temp. It comes out the bottom line which I ran to the top nozzle on the Derale cooler. You can see where I drilled 2 3/4" holes in the plastic for the lines to go through. The bottom line goes to the return line on the radiator, and cool fluid returns to the transmission (The factory hose is just long enough to reach the new cooler where I positioned and mounted the new cooler, otherwise I would have had to buy extra hose). The mounting straps that come with the new cooler are plenty strong, judging by how much I had to fight the hoses. Also, I mounted the new cooler to the air conditioner condenser, the condenser is held on with 2 bolts, and unbolting you can get just enough clearance to reach behind it to tighten the straps. So the straps don't go all the way through to the radiator, so I didn't have to remove the electric fan. The hoses are loosely zip tied to each other, so they don't touch the air dryer. Some people say it doesn't matter how you position the external radiators but this is false. Radiators are design to take in the warmer fluid on the top and the fluid cools as it goes down (heat rises, cold falls). This allows for better circulation on systems that don't have an active fluid pump. This is also the most efficient configuration and since the transmission breather sits on the top size of the engine, it also reduces the chance of air sitting in the system. I didn't find any good installation videos or reviews that really explained how they installed their cooler. So I hope, along with my photos, this helps some of you.


I researched installation instructions thru multiple resources [online sties]. Some info. was conflicting and needed clarification. I discovered that the cooler could be installed in any vertical position. Also the cooler should be connected on the return line to the transmission. The cooler unit works well and lowered my transmission temperature 15-20 deg.F. under tow and in hot desert climate. My 2017 GMC Sierra has an auto-shuttle valve on the transmission that opens at 190 deg. F. When towing the sweet spot operating temperature is 200-205 deg. F. I've got over 10,000 miles on the cooler and so far so good!

Stephen D.


The transmission cooler is performing as expected.


It has been a year since I installed the 8000 series transmission cooler. It has lowered my transmission temperature 30 plus degrees. The install was easy.


Finally finished the installation. The adapter didn't work for my application. I found an etrailer video that used Derale Snap-In Radiator Adapter Fitting for GM
Item # D13035. Ordered the adapter for my 2007 Jeep Compass. That did the trick. The mounting steps with the kit were ok but I only managed to put in 3 of the 4. However the oil cooler is secure and won't budge. I'll update if needed but the install was a success.

2006 Jeep Grand Cherokee

Decent kit overall. I have 2 issues... #1 Installation video and instructions glaze over the fact that in most vehicles there is only about 1/2 inch of room in between A.C. condensor (even after loosening bolts) and radiator making it extremely difficult to install using the included push rods. It took me forever and was a complete pain. #2 for my vehicle a 2006 Jeep grand cherokee, I apparently needed a special "GM" adapter even though my vehicle is not made by General Motors and nothing said I needed this special adapter until I took everything apart and found out whateber insta-adapt came with the kit was not going to work. I had to wait several days until I received the adapter to complete the install, again frusterating and not communicated to the buyer.

2015 GMC Canyon

Installed in a 2015 GMC canyon. Seems to work fine will update when I get some towing miles logged. Used the D13035 adapter and the D13002 universal mount kit so I did NOT have to zip-tie to the condenser. Slight mod to snip off the tip to create an angle on the derale bracket then mounted it to the support bar upfront and screwed bottom into the radiator support

2003 Toyota Tacoma

Transmission cooler installed on 2003 Tacoma RWD.
The Transmission Cooler was easy to install. No problems whatsoever.
I chose to mount it behind & left of the license plate.

Pete W.


I like the peace of mind it gives me. Even though I only pull a small utility trailer. I expect it will add to the transmission longevity

2003 Chevrolet Avalanche

Excellent quality and build. I installed this in a 2003 Chevrolet Avalanche. I wanted a factory look installation so I mounted the bottom of the cooler in the factory bracket located mid way and made a bracket to mount the top of the cooler. I mounted it with the hoses downward so they will not be visible from the outside of the car. See pics for details on the brackets and mounting.

2005 Nissan Pathfinder

Installed this in a 2005 Nissan Pathfinder. Fit is excellent. I wanted to remove the factory radiator connection as this is a common point of failure allowing coolent to enter the ATF. This is plumbed from the transmission to the factory cooler, then to this new cooler, then back to the transmission. The only thing extra I had to buy was a 3/8 double barb to connect to an existing hose. This cooler adds about half a quart of ATF to the system. I can't speak for any temp drops as I don't have a temp gauge installed yet.

2002 Honda Odyssey

This cooler was easy to install. I did not use the insta-dapter fitting that comes with the cooler. I used a 5/16 barbed coupler instead. One thing I should note is: the instructions state, "warm the vehicle and locate the cooler line and that one will be the return". In my case the radiator made the return line hotter after warming the vehicle for several minutes. I had factory Honda cooler instructions available at install. So return line location was a no brainer. Derale instructions had me second guessing my connections after install was compete. It's installed on a 2002 Honda Odyssey with a newly installed transmission at 70K. I had to remove the headlamp assembly in order to tip the condenser coil far enough to get my hand behind it.

2004 Honda Odyssey

Installed the transmission cooler before our 15 hour trip to Florida from Kentucky. Previously had overheating problems with the transmission on long trips. The transmission never overheated during our latest trip with this new transmission cooler installed. Cooler came with everything available, with the exception of tools, to complete the installation. I will install another one if we upgrade to a later model Honda.


This transmission cooler fit perfectly behind my grill. I mounted it on brackets in lieu of a direct mount on the radiator. I’m glad you recommended the GM adaptor hose fitting as my application would not work with the Insta-Dapt which was not compatible.
Works great towing my 4,000# trailer in this Florida heat.

2011 Chevrolet Suburban

Easy install. Thanks for the video! I didn’t need to cut out the plastic underneath as the video described. Looking forward to things running cooler!

2016 Honda Pilot

It was a pretty straight forward installation. I did have to remove the battery and tray as the factory spring hose clamps were positioned such that I could only get at them from the top, couldn't squeeze the clamps from a below angle. Thankfully I watched their video before ordering to see I needed another length of hose to finish the install. Took about 3 hours and seems to work well.


Wow, the install was a pain in a 2001 Toyota Sienna, not a lot of room to work. But the cooler is great, about 20 degrees out so cooler than without it, so that is great!

2007 Chevrolet Avalanche

Part seems to be okay. The hose is to short. Now I have to wait a few days to receive more hose to finish installation. etrailer should add more hose than the length that comes with it. On many applications this cannot be intalled effectively with the amount of hose in the kit. This is even mentioned in the video that etrailer provide.

2007 Nissan Xterra

Very cool product! I can't seem to 'feel' the difference while driving, but when engine cold, the transmission shifts harder.....probably proof that the transmission fluid is not warming up as much

Show More Reviews

See what our Experts say about this Derale Transmission Coolers

  • Do Transmission Coolers Have Specific Inlet And Outlet Fittings When Installing
    When installing the oil or transmission coolers in a vehicle it does not matter which fittings are used for the inlet or outlet. The main concern is to make sure you have enough room when installing the cooler. I have attached a helpful article about transmission coolers you can check out.
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  • How to Pick Out a Transmission Cooler for a 2011 Hyundai Accent
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  • Where Should a Transmission Cooler be Mounted on a 2002 Acura MDX
    There are actually 3 possible places you could mount the transmission cooler, # D13503. The first location is in front of the A/C condenser core and is the most efficient place. The second most efficient location is between the core and the radiator. You would place the cooler against the radiator. The cooler comes with little pads that go between the two components but they do not separate them very much. Despite this, the area of the radiator that will be blocked is small enough that...
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  • Why Would 2006 Jeep Commander Need a Transmission Cooler
    Are you wondering what benefit you'd get from installing a transmission cooler? Depending on the engine size of your Commander and the frontal area of the trailer, the towing capacity of your Commander can range from 3500 lbs for the 3.7L up to 7200 lbs for the 5.7L engine according to what I read in the owner's manual. If you're above half the towing capacity, I'd give serious thought to installing a transmission cooler and would consider it extremely important if you're towing in hilly...
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  • Supplemental Transmission Cooler for 2015 Ford F150 2.7 Ecoboost
    I'd definitely recommend using a supplemental cooler such as the Derale # D13503 you'd looked at. A transmission cooler is an excellent yet inexpensive way to protect your transmission. The cooler installs inline with the transmission return lines from the radiator, and the best location for the cooler would be directly behind the grille, in front of the radiator. The cooler has plenty of vanes that will let air pass through, so there's no worries of restricting air flow to the radiator....
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  • Does it Really Matter if Transmission Cooler is Installed Before or After OEM Cooler
    Your most ideal routing for a transmission cooler would be from the OEM cooler to the aftermarket cooler if the OEM cooler is integrated into the radiator since the proximity to the radiator fluid might end up warming up the fluid after the aftermarket cooler. If the OEM cooler is separate from the radiator it makes no difference which you use. The way to tell easily requires a buddy you trust. When the vehicle is cold grab both of the transmission lines from the OEM cooler. Have a buddy...
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  • Will Additional Transmission Fluid Be Needed After Installing a Cooler on a 2006 Jeep Commander
    The core of transmission cooler # D13503 won't hold a lot of fluid and it depends on how much hose is used so you just have to perform the installation and then check the level and add fluid as needed. Be sure to use the correct fluid for your vehicle (check the owners manual or the fill location) because some vehicle transmissions are very sensitive regarding the fluid used.
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  • Derale Transmission Cooler Installation in 2008 Nissan Altima
    To install Derale transmission cooler # D13503 in your 2008 Nissan Altima with 2.5L inline 4-cylinder engine you will need to identify the send and return lines to and from the factory cooler that is inside the radiator. The Derale transmission cooler will install in the return line, which is the cooler of the two lines, the one that leads back to the transmission from the OEM cooler. To find this line, start the COLD engine, shift the transmission into drive for 15-seconds and shut it...
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  • How to Identify Transmission Inlet Line on 2000 Nissan Maxima
    The procedure for identifying the inlet and outlet lines on your transmission for purposes of installing a cooler like # D13503 is to start the COLD engine and shift the transmission into drive for 10 seconds. Stop the engine and remove key. Immediately feel both lines; the cooler of the two is the return line. In a separate email I have linked complete instructions for you. Two helpful articles are linked in this email.
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  • Can a Transmission Cooler be Installed on a Sealed Transmission
    Sealed transmissions make installing a transmission cooler a bit more interesting since there isn't an easy way to add or check fluid. There may not be a dipstick on your transmission, but there is drain and fill plug. You are going to have to use a lube pump to get the proper amount of fluid in the vehicle so honestly your best option is going to be to have a transmission shop do the install since they will have the equipment needed. Prefilling the cooler might get you pretty close...
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  • Recommendation for Transmission Cooler on 2008 Nissan Altima with CVT Transmission
    If the CVT transmission on your 2008 Nissan Altima has cooling lines that run from the transmission to the radiator, you can install a transmission cooler. If it does not have these lines running, then an after-market transmission cooler is not recommended. The concern centers around the fact that any changes to the system from a cooler installation will affect the fluid pressure, which will in turn affect shifting performance. If you are unsure, I recommend checking with a local Nissan...
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  • Will A Supplemental Transmission Cooler Void the Factory Warranty on a 2017 Toyota Sienna
    While we do offer transmission coolers with a superior design in comparison to the factory transmission coolers neither of our aftermarket transmission cooler manufacturers Derale/Flex-a-lite were able to provide information as to what transmission cooler meets OEM specs. The supplemental coolers we offer are just that, supplemental meaning they are designed to be used in addition to the factory transmission cooler. However, I can honestly say I have never heard of people running into warranty...
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  • Transmission Cooler Recommendation for 2018 GMC Sierra 1500
    For your 2018 GMC Sierra 1500 the Derale transmission cooler part # D13503 would be a great cooler. I recommend it because it is a larger cooler at 11" Wide x 8-3/4" tall x 7/8" deep and is a plate fin style cooler which is a very efficient style.
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  • Transmission Cooler Needed for a 2007 Jeep Compass
    Although there are quite a few vehicle accessories that are specific to the year/make/model of a given vehicle, transmission coolers are the exception. When looking for a transmission cooler you want to find the biggest one that will fit in your engine compartment to get the most out of it. The best place to install a transmission cooler is in between the grille and AC condenser core on your 2007 Jeep Compass as this will allow the most airflow to cool the fluid more efficiently. I have...
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  • Where Can Derale Transmission Cooler be Installed on 2016 Ford F-150
    I'm not 100 percent sure what you mean specifically by "in series" but the Derale Series 8000 Plate-Fin Transmission Cooler Kit # D13503 is designed to be a supplemental cooler so it will work along with the factory transmission cooler of your 2017 Ford F-150 with a 2.7L V6 EcoBoost engine. It is meant to be installed at any spot where there is space for it to fit. I have added a cut out which shows the recommended places where the cooler should be installed. The cut out is from the...
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  • Transmission Cooler Recommendation for 2013 Honda Pilot
    When mounting a transmission cooler you want to install it in a location that will provide it with the max air flow as possible. Typically in front of the radiator is the best as that's where the vehicle was designed to provide the most air flow. Even being near the radiator the air moving as quick as it does through the fins would prevent heat build up. Plus you have the fan pulling the air through the cooler when at slower speeds. That being said you still can mount it away from the...
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  • How Much Transmission Fluid Should Be Added When Installing Derale Transmission Cooler
    In regards to installing a transmission cooler like the Derale Series 8000 Plate-Fin Transmission Cooler Kit part # D13503 which is an excellent option, you will indeed need to add additional fluid to the transmission to account for the increased capacity. That said, I cannot provide a specific amount as there are too many variables such as the current level in the vehicle and how much line is used. I can however say that you should not need more than a quart so you can pick one up and...
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  • Determining Return Line for Installing Transmission Cooler
    We have to determine which transmission line is the one that returns back to the transmission and that is the line a supplemental cooler would need to be installed on. In order to tell which transmission fluid line is the return line leaving the factory cooler of a vehicle like your 2013 Ford F-150 you want to start with your vehicle cold. Start it up and put it in drive and brake torque it (apply brakes and rev the engine), for about 10 seconds or so, put vehicle back in park, and turn...
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  • Proper Location of Inlet and Outlet Lines When Installing Plate-Fin Transmission Cooler
    When installing a plate-fin transmission cooler such as the Derale Series 8000 # D13503, it does not matter how the cooler is oriented as it relates to the transmission lines and their flow. The fluid will move through the cooler by way of the line pressure from the transmission. Having the inlet on the top or bottom will not affect or prevent proper flow of the transmission fluid. If it is easier to simply keep them as they are installed in your vehicle, this is perfectly fine and the...
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  • Where to Install the Derale Transmission Cooler Kit # D13503 on a 2002 Toyota Tacoma
    The Derale Series 8000 Plate-Fin Transmission Cooler Kit, part # D13503, would be a great fit for your 2002 Toyota Tacoma 4x4 3.4L towing a 3,500-lb travel trailer. You will want to measure to make sure you have enough room for the 11 inch wide x 8-3/4 inch tall x 7/8 inch deep heat exchanger to fit in front of the A/C condenser. This is the most efficient location for a transmission cooler. Ideally you want the transmission fluid to be between 160 and 200 degrees for the best operation...
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  • Locating Transmission Return Line on 2009 Nissan Murano
    Determining which line is the return is pretty easy. First, locate the transmission lines. Then, start the vehicle, and place the transmission in drive for 10 seconds. Place the transmission in park, and turn off the vehicle. Feel both transmission lines. The cooler of the two lines will be the return line, which is the one you would use to install the transmission cooler. If you know which model of transmission is in your Murano, you can use the provided table to look up the location...
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    Image 1 for
  • How Are Coolant Lines Run For Transmission Cooler
    When the lines on a transmission cooler like part # D13503 are referred to the inlet line is from the radiator output. The output line is then connected to the transmission. This is because the factory transmission cooler is surrounded by coolant and will be a little cooler when going into the aftermarket cooler like part # D13503. I have attached a drawing that shows how the coolant lines are run when using an aftermarket cooler.
    view full answer...
    Image 1 for
  • Does Rear End Gears Make a Huge Difference for Towing Capacity of Vehicle
    Rear end gears will make a huge difference for towing capacity. Higher numerical gears give additional leverage over the weight of the trailer so the impact "tow package" gears have cannot be understated at all really. If you have the gears that mean you have a 3,500 towing capacity you'd have to stick with that unless you can contact Dodge about swapping gears.
    view full answer...
  • Transmission Cooler for 2006 Nissan Pathfinder
    We recommend going with the largest, most efficient cooler that will fit into the vehicle. The Derale Transmission Cooler you referenced, part # D13503 would be an excellent choice for your Pathfinder, assuming that there is available space behind the grille for it. The ideal mounting location for a transmission cooler is directly behind the grille, in front of the A/C condenser and the radiator. The # D13503 measures 11x8-3/4x7/8 thick. You would need to measure the available space behind...
    view full answer...

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