Derale Transmission Cooler Installation - 2005 Nissan Pathfinder

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How to Install the Derale TranSMIssion Cooler on a 2005 Nissan Pathfinder


Today on our 2005, Nissan Pathfinder, we'll be installing the Derale Series 8000, Plate Fin Transmission Cooler Kit, part number D13504. Before we can begin installation, we'll first need to remove the lower rock guard. To remove the rock guard there are multiple fasteners that will need to be removed. Were going to go ahead and remove the front grill. To remove the front grill we've got multiple fasteners across the top, and on the front.Then once the fasteners are removed we'll reach inside the grill and release the plastic fasteners holding it to the bumper cover. Now we'll go ahead and remove the grill and set it aside.

Next we'll go ahead and take our cooler and test fit it to the vehicle so we can find a good mounting location. Here attaching it to the manufactures cooler, will be a good spot for connecting our lines and getting good air flow across our new Derale Cooler.Next using the mounting rods, clips and foam pads, we'll attach our new cooler to the manufacturers. Now we'll go ahead and continue pushing the mounting rod through the old cooler, and then put the mounting clip on the back side, securing the new cooler to the old cooler. Next we'll go ahead and repeat the same process for our other three attachment points. Quick tech tip, you can also remove the fasteners for the old cooler to gain easier access for installing the mounting rods, foam pads, and clips.We'll go ahead and do that now for our last attachment point.

Now with all four attachment points in place we can go ahead and take a pair of side cutters and cut off the excess from the mounting rods. Now with our transmission cooler mounted we can start connecting the lines. We'll first remove the protective end- caps for the new cooler. Then we'll go ahead and remove the return line coming out of the old cooler, and attach it directly to the new cooler.Before we install the hose onto the new cooler, we'll go ahead and remove the manufacturers clamp and install one of the new clamps provided with our install kit. Once you have the hose on far enough which will be approximately 1/4 to 3/8 of an inch, we can go ahead and tighten down the clamp to secure it.

Next we'll go ahead and take the new piece of hose provided with our install kit and slide it on to the top end of the new cooler, once again, making sure we have the hose on far enough.Next we'll go ahead and begin routing our hose so that we can cut the length. We'll be routing back in to the end of the manufacturers cooler where we previously removed the hose to go into the bottom of the new transmission cooler. Once we have our length, we'll go ahead and cut off the excess of the hose. Next we'll slide on two clamps and install the hose on old. With the hose installed we can now go ahead and tighten down the clamps.

Now with everything secured, we're ready to go ahead and start the engine allowing the transmission to warm up and check for leaks. Now once we've checked for leaks, you can go ahead and check fluid level and top off as per manufacturers specifications. We can go ahead and start reinstalling the grill and rock guard. Now with everything reinstalled, that will complete the installation of our new Derale Series 8000, Plate fin Transmission Cooler Kit, part number D13504, on our 2005 Nissan Pathfinder. .


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Info for this part was:

Employee Andrew K
Video Edited:
Andrew K
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Nicholas E
Test Fit:
Nicholas E
Employee Randy B
Test Fit:
Randy B
Employee Andrew L
Video by:
Andrew L
Employee Brent H
Installed by:
Brent H

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