External Transmission Cooler Installation
In my last article, I dealt with the installation of a new double pass radiator to help with cooling issues. This article will deal with keeping that transmission fluid cool and performing as it should. Since I have a TH400 with a higher stall converter, I will need something better than a stock cooler in a radiator. Generally, higher stall torque converters will generate more heat at higher RPM's and trying to cool the fluid with a stock in the radiator cooler isn't enough. Cooling the transmission fluid this way will also generate more heat in the coolant. So if you are having issues with a vehicle running hot, switching to an external transmission fluid cooler is an option. Since my new radiator wasn't equipped with an in the tank cooler, I opted for an External Transmission Cooler. This is an aluminum 6 pass cooler that comes with 4 foot of 3/8" hose and the EZ-tie style mounting rods/clips. I also opted to use this Universal Transmission Cooler Line Kit. This kit includes pre-bent hard lines with the correct 1/2"-20 inverted flare male ends for the transmission side and some extra 5/16" hose and clamps. For my set up, I wasn't crazy about pushing those plastic tie straps through the core of my brand new radiator. And since my radiator had a nice mounting lip on the top and bottom, I chose to use some 1/8" thick 1" wide strap steel I had leftover from my radiator swap.
After measuring the length I needed, I drilled a hole in each end of the strap and used some small countersunk bolts from the back of the strap to bolt the cooler to. I doubled up on the ends of the strap to add clearance between the fins of the radiator and the transmission cooler and painted them black for corrosion resistance. I then centered the transmission cooler and mounted it low to match the opening of the grill for maximum airflow.
With the cooler installed and the hoses attached, I was in business to keep that TH400 nice and cool with a clean look and top performance.
Products Featured in this Article
Universal Transmission Cooler Installation KitView$21.99Compare