Derale Series 8000 Plate-Fin Transmission Cooler Kit Installation - 2018 Jeep Grand Cherokee

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How to Install the Derale Series 8000 Plate-Fin Transmission Cooler Kit on a 2018 Jeep Grand Cherok


Ryan: How's it going Ryan here at etrailer.com. Today on our 2018, Jeep Grand Cherokee, we're going to be taking a look at and showing you how to install the Derale series 8,000 Plate-Fin Transmission Cooler. Jeeps are very versatile vehicles and can be used to get a little bit of everything done. While some people may just run around town and run their errands in them, others may use them to do a lot of towing. That's where the Transmission Cooler is going to come into play because doing all that towing is going to put some extra strain and work on your transmission and that's one thing you're always going to have in the back of your mind is you're towing your trailer down the road, knowing that your transmission could potentially overheat and leave you stranded on the shoulder.Now the way this is going to help cool, your transmission fluid is very simple. Warm fluid is going to come in through one side and that fluid is going to travel across, see small plates over to the other side.

Well, these fins are going to work as a heat exchanger, more or less. So with that hot fluid going across and whenever we're driving down the road, cool air is going to go in between those fins and cool that fluid down that cool fluid will come back down and back into the transmission, thus lowering operating temperatures and keeping your transmission more reliable.And the main questions we get in regards to transmission coolers is where they can be mounted. Well here in our Jeep, once the front fascia is removed, we're going to have plenty of space. My only suggestion is to mount it where it's going to get the most air flow through the front of our grill. I personally like the plate-fin style like we have here today, over the tube-fin style that's for a few reasons, the plate-fin is going to be very compact and it's going to have hard solid edges, and that won't allow our fins to get so crunched up and damaged as opposed to the tube-fin, which it's more or less a couple tubes that run through here and these fins are going to be exposed and get beat up a lot easier.Now, this might seem like a big and valve job to get the transmission cooler to install, but in all honesty, once we have that fascia removed, it's really not that bad and it's relatively straightforward.

Speaking of which let's go ahead and put it on together now.To begin our installation, we're going to need to remove our front fascia to give us enough room to work. So we're going to start by taking off two fasteners of top here to get this off. We'll just take a trim panel tool or a flathead screwdriver, pry underneath the head of it and we can get underneath the base of the fastener, pop it out. I'm going to do the same thing for this one right here. Now, if we come over here to our wheel wall, we're going to have a few fasteners that we need to take off.

We're going to first start with this 10 millimeter bolt here, we'll grab that 10 millimeter socket, take that out. Now these other two fasteners are actually just plastic rivets. So we'll just use a drill bit to drill out the center of them to get them out.Once all those are free you can kind of just take your fender guard here if you will, peel it back until we get it past our edge, where our fascia needs a quarter panel. Now, if we come underneath the front fascia on the bottom side, we're going to have a couple of push sol pin fasteners that we need to take out. We'll go ahead and do our trim panel tool underneath the head of it, we'll work it out.

The other side of the vehicle is set up the exact same way, so we'll just remove those fasteners as well. Now we can separate our fascia in front of the vehicle. So we'll start on the corner and kind of just gently work it back, trying to get these clips to free. Once we get to about the corner of our headlight, we'll go ahead and go over on the other side and do the same process.Once we get each corner break free, we'll get an extra set of hands to kind of help us pull up the rest of the way off of front of the vehicle. You might have to kind of wiggle it and work it just to be patient, and eventually it'll pop free. Now, if you have any lights down here, you're going to make sure to disconnect them like you do here. So go ahead and just expand each clip on most sides and pop that free. Now we can set our front fascia off to the side somewhere safe.Now we're going to remove the bolts that secure our coolant tank. That way we can move it off to the side and have some more room to work whenever we go to disconnect our lines, that's how I placed by two 10 millimeter bolts. Well kind of just slide it out, just kind of tuck it over here for now.So, now we can take our cooler and get our line installed on it. Now, before he put the rubber hose on the ends, what you want to do is grab one of the included hose clamps, just slide that over and what I'm going to do is take some transmission fluid and just kind of coat that, fitting. That way we can have a little lubricant and it'll make it easier to slide on. Just take the hose and work that over the fitting, as far as we can go. I'll just go ahead and do the same thing to the other side.Now we can go ahead and cut the hose here in the center. Just turn it into two pieces. Now we can go ahead and tighten down both of our hose clamps. Now we can go ahead and secure our transmission cooler. Now you want to put this in an area that it's going to receive plenty of air flow. So I'm going to choose right about here in this area and what I'm going to do is use these included ties to get it secured, these are going to push through one side of your radiator and AC condenser through the fins, and we'll get it to come out through these holes where we can secure it.Now, before I put the end zone back here, what I'd like to do is get them all started that way if I need to make a minor adjustment, I'm able to do that. Once we have all of them in place, we know it's going to work. You can put on our foam pads, we are going to peel that backing paper off, pull that back through. What we're going to do, put that over a tie and then back in through our transmission cooler and that'll kind of just give it a little cushion, a little separation there. We can go ahead and secure them with the locking retainers.So not everything's completely secured and at the top two from outside and the bottom two from the inside, and we cut the tails off, make sure it's nice and tight. And now we can go ahead and take our line and kind of just start to run it towards the passenger side here. I kind of just routed my lines down through here and out the bottom for now, because eventually we're going to be routing them up here towards the factory transmission cooler lines.Here's where our factory transmission cooler lines are coming into our AC condenser and we're going to need to identify which one is the return line because that's the one we're going to tap into. So what we went ahead and did, is start the car, let it run for a while, maybe drive it around and you're going to feel the temperature of each line and the one that we're looking for is going to be the colder out of the two. That one will be the one on top.So here's that line that we need to disconnect. So to start, there's going to be a white plastic dust cover that you can kind of just pull back with your fingers. We'll just push it back for now. I went ahead and removed this, because it'd be extremely difficult to see, but there's a little clip just like this, that actually sets in this group and that's actually keeping that transmission line locked into position. So when I remove this, I use a very small pick where you can use a very small Flathead screwdriver. We want to be very careful because these tend to, whenever we get about halfway out is they want to shoot off and then they can easily be lost. So, be very careful and keep that in mind when you're pulling this out.Now, once this is out, put it in a safe place so we don't lose it. And then you can simply just work that line out. Now, usually you will lose a little bit of transmission fluid, not a whole lot, but some old dropouts. So just keep that in mind and have a rag ready. All right, so here's one of the lines coming from our new transmission cooler, where we're going to do is cut this to length and attach it to the end of our factory line here. So I'll just go ahead and cut off that extra hose that we're not going to use. I'll just get that out of the way. I'll go ahead and put on host clamp. And now I can push our rubber hose onto our factory line. Once we got our rubber hose over our factory transmission line, what we're going to do is slide our hose clamp over it and tighten it down.Now our other transmission cooler line, this is going to get plugged back into this factory fitting right here on our AC condenser. Now, the way we're going to do that is you use a fitting that allow us to push one end of the fitting into that line. And the other end of the fitting directly back into this factory housing. That way we don't have to make any cuts or do anything special like that. So before we plug this AC condenser, I'm going to first get it started on the other end of our line. And we don't want to push a hose all the way down because this is going to sit a little ways inside of there. So halfway down is sufficient, but before we plug that in, go ahead and take our hose clamp, put it over, we will tighten it on down and once that's tight and you can simply plug that fitting inAnd then we'll take that pin that we set off in a safe spot. And re-install that this will kind of just push it back into place. We'll kind of snap down and fall into place. And then if you try to pull back on the line, it won't come out and it'll move a little bit and that's acceptable. As long as it doesn't come right out, we're in good shape.Now at this point, I went ahead and re-secured our coolant tank using those two factory ten millimeter bolts. Now, at this point, before we put everything back together, it's a really good idea to start the vehicle and let it run and check for any leaks. And once you verify, there's no leaks, it's not a bad idea to have your local dealership, check your transmission fluid and top it off if necessary.All right, I went ahead and started the Jeep and let it run for a while, verified that we have no leaks and now we can go ahead and reassemble the front end, the opposite order that we removed it before you completely reinstall your fascia. Don't forget to plug your lights back in. Now, since our fender flares we're attached with plastic rivets and we had to drill them out, we are going to have to replace them. So right here, I got some plastic rivets which are sold separately. Whenever they're gone, just line them back up and re secure. That a little bit overhangs, so we can just come back and trim that off. And that'll finish up our look at and our installation of the Derale series, 8,000 Plate-Fin Transmission Cooler on our 2018, Jeep Grand Cherokee..


Questions and Comments about this Video

Jordan N.

Just ordered to install on a 2018 Jeep GC. Do I need to also order a new barb adapter, or will the one shipped with the Derale work? Also, how much additional transmission fluid should be added to get the levels correct? The 2018 GC is fill-for-life so there isn't a dipstick i can check.

Etrailer Expert
Reply from Jon G.

According to the installation video (minute mark 10:50) it looks like we used the adapter # D13035 for this installation. We have reached out to Derale in the past about how much fluid needs to be added and they never give us an answer really because they say that fluid will be lost during the install so they don't have a set number. We do have an expert answer page saying that an extra 1/4 to 1/2 quart should do the trick but it would be good to contact your local Jeep dealer to see if they have a way for you to make sure that you have enough fluid since you don't have a dipstick.

Aaron H.

What is the part number for the fitting he used to connect to the factory cooler? I think I need that exact part for my 2013 Durango install, but I can't find it.

Etrailer Expert
Reply from Jon G.

The part number used to connect the Derale Series 8000 Plate-Fin Transmission Cooler Kit # D13502 in this video (10:55 mark) is part # D13035 . Please note that this adapter is designed around GM vehicles so I'd try using the Insta-Dapt Adapter # D13004 that should have come with your transmission cooler first.

Reply from Aaron H.

@JonG I tried that. That fitting it 5/16, the place to thread into is 5/8. I got sent D13034 for Dodge vehicles and the threads were wrong. Apparently that is forbilder Dodge trucks. And ironic that you are saying it is a GM adapter when the video is another Chrysler product for which it obviously worked.

Reply from Jim D.

I had the same issue, I need the part for the vehicle shown, 2018 GC, like mine. The instadapt does not fit, then the Jeep barbed adapters look good to fit but do mot fit and the package show they are barbed adapters for Jeeps up to 2010 rubber to rubber. All info not shown online when selecting. Will the D13035 GM adapter fit my ‘18 Grand Cherokee? Kind of a pain with everything installed except connecting the lines so I can use it. I will be towing in the Rockies and was hoping to have additional cooling.

Etrailer Expert
Reply from Kef G.

@JimD Yes, the Derale Snap-In Radiator Adapter Fitting for GM, part # D13035, is what was used in this video for the 2018 Jeep Grand Cherokee. This will fit on yours as well.

Reply from Jim D.

@KefG Great. I will order it and finally finish this project. I have to say I am disappointed that there is no reference for this either in the video or on your site. I could not make the supplied item work so I ‘reordered’ the Jeep adapters, and they were for connecting two rubber hoses for earlier model jeeps and totally useless for me. I will order this item. Too bad it costs me as much in international shipping and taxes as these items cost.

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