DD-67L-1719-TCOOL - Last Updated: 4/7/2022
When installing this fitting, leave it fully assembled and just slightly loosen the nut. The fitting will
slip over the tubing until the tubing bottoms out inside, about ¾”. When tightening the nut, hold the
nipple end of the fitting with a deep socket and ratchet, making sure it stays firmly pushed onto the
tube, and tighten the nut with an open end wrench until it stops. The nut WILL NOT bottom out
against the fitting, there will probably be about 1/8” gap between the nut and the fitting when tight.
27.Using Figure 27 as a guide, and the instructions provided above, install both 08HB-08Comp
compression adapter fittings onto the previously cut OEM transmission cooler line and tighten.
28.Locate the (2) 30” sections of transmission cooler line and (4) hose clamps. Using a pair of
adjustable pliers, install a clamp about 2-3” up one end of each hose. CAUTION : these
clamps are very strong, we recommend using a medium to large set of pliers.
29.Install the ends with the pre-installed clamps onto the compression fittings that were installed
in step 27, see Figure 28. Once the hose is installed over the hose barb, squeeze the clamp
and slide it into place about ¼” from the end of the hose.
30.Using Figures 29 & 30, route the (2) 30” sections of transmission cooler line up from
underneath, on either side of the trans cooler, inside the silver oval bumper brackets.
31.Secure the OEM metal cooler line into the plastic clip that was opened in step 24.
The cooler hose must be trimmed to connect to the cooler now. Notice in Figure 31 that you will
need to make sure that the cooler hose stays inside of the lower grille clip locations, or the grille will
not be able to snap into place. It may be necessary to slightly (and carefully) adjust the angle of the
cooler inlet and outlet tubes to get the hose to align properly.
The plastic split loom may need to be trimmed as well. It is acceptable for the split loom to reach
the insulated clamps shown in Figure 31, but it will not fit inside the clamp. If needed, be sure to
carefully trim some of the split loom before attempting final installation of the hose and the insulated
hose retention clamps.
32.After determining the necessary length, carefully trim the transmission cooler hose to produce
a square cut end. If you are unsure, trim only a little at a time and test fit until correct. It is
best if the final length leaves a little slack in the hose below the retention clamp, you do NOT
want the hose to be pulled tight when installed.
33.Install a hose clamp about 2-3” up the hose from the end, slip the hose over the transmission
cooler tube until it hits the stop, and position the clamp about ¼” from the end of the hose.
34.Open the vinyl coated clamps, slip them around the cooler hose and squeeze closed. Position
as shown in Figure 31, making sure that the insulated side is NOT blocking the opening for the
lower grille retention clips.
35.Repeat the process of PRE-DRILLING and HAND INSTALLING followed in steps 20 & 21 to
secure the clamps to the front of the grille support with the remaining (2) #10 Phillips screws.
36.REMOVE the Hose Pinch Pliers installed in step 23. We are going to run the engine and
check for leaks, this step is extremely important! Do NOT move on until this step is complete!
37.With the truck still on jack stands, start the engine and let it run at idle. While the engine is
running, carefully inspect all fluid connections (ie 4 hose clamp connections and 2 compression
fitting connections) for signs of leakage. Keep in mind that there may be some lubricant
around the compression nuts if you lubricated the ferrules before installation. We recommend
allowing the engine to run long enough to start feeling the cooler get warm. Remove the
truck from the jack stands and proceed with the next steps if there are no leaks.
