FJ62 transmission cooler (1 Viewer)

Joined
Apr 30, 2018
Messages
83
Location
Morehead City NC
Had my A440 trans rebuilt a few years ago and had an external trans cooler installed at the time bypassing the trans cooler on the radiator.

Now my radiator is blown and I’m replacing with one from CCOT.

my question is this. Should I run the trans cooler and the external in series to expand the cooling efficiency or just bypass the one on the new radiator and continue to use the external only?
 
Joined
Sep 20, 2019
Messages
283
Location
Marquette Michigan
I would use both, run it into the radiator first, that'll bring it down to coolant temp then run to the external and that'll bring temps down further. This is how I run mine and it's very efficient
 
Joined
Oct 30, 2007
Messages
10,359
Location
Plano texas
Hi, I run both in all mine. Make sure to put exactly the right amount of fluid back in,drop pan and clean filter Too.
 
Joined
Apr 30, 2018
Messages
83
Location
Morehead City NC
Even with the added fluid capacity of the extra cooler and longer lines. I would expect the trans fluid quantity would be significantly more.
 
Joined
Jul 8, 2012
Messages
383
Location
New Harmony, Utah
I'm running this one. Derale 53406 34 Row
I have a temp gauge installed and hardly ever get above 180 degrees. It holds an extra 3/4 of a quart of fluid, which is a big plus as well.
Don't use 6an stuff....
Definitely keep your radiator in line, it'll help cool plus it holds more ATF.
 
Joined
Nov 13, 2020
Messages
325
Location
Dallas Texas
I’ve watched this thread and others about cooling. I’ve been plagued with heat issues. Installed a Derale transmission cooler and yanked the junk from po had installed oil temps were running 230+, transmission 240+. Water struggled to keep 210 Texas weather. Today after all in everything brought down 15-20%. 5.3 LC9 now breathing better.

Also replaced overflow tube that was crammed against bottom of reservoir. I opened the hood last night and noticed top radiator hose was collapsed. Cut the end of the line at a 45 degree angle. Hasn’t happened again. Hope it was that easy
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Joined
Jul 8, 2012
Messages
383
Location
New Harmony, Utah
I had my first Utah heat summer with the biggest derale I could fit, 53406 34 Row.
I have a temperature gauge installed and really struggled to get it above 180 degrees all summer.
It holds almost an extra quart of fluid.
One of the best things I've done for the AT.

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