You already have both.

A very common upgrade it to remove the 9 row external cooler that came with the truck and install the 30 or 36 row (?? I believe) that came with the 6.0 trucks. The bigger cooler is far superior and a few suppliers like RiffRaff have it as a kit with everything you will need for the install.

 

You already have both.

A very common upgrade it to remove the 9 row external cooler that came with the truck and install the 30 or 36 row (?? I believe) that came with the 6.0 trucks. The bigger cooler is far superior and a few suppliers like RiffRaff have it as a kit with everything you will need for the install.

I put in the 36 row cooler and it really keeps the temps down on my E99 F250. If I had to do it over again, I think I would go with the 30 row cooler. The reason was the as part of the install there are 2 support straps that I had to modify so the 36 row cooler wouldn't rub against the straps at the top corners of the cooler. I had to notch the strap and it cut about 1/2 way through the strap. I really hated to grind on the straps and weaken them. I think the 30 row would have passed under the straps. I only need about a 1/2 of height difference.

 

I did what @Jimmy's Pilot Service said to my '01. One of the best mods I've done. Dropped temps a LOT! My lines run through the radiator, up through the 31-row cooler and back to the trans.
Look down between the AC Condensor and the radiator. Will probably need to remove the top cover between the grille and the radiator support to be able see down there.

 

There's no doubt that the Stock cooler is Way Undersized and the reason that Ford made such a drastic change for the 6.0

Whether to continue to run the fluid thru the Radiator or not is a minor consideration I think. If you live in a climate where it gets pretty Cold you might be more inclined to leave it to aid in warming the fluid more than cooling it in the very cold. If it never gets that cold where you are, bypass it, why make it 180*F and then cool it down again

 

If it never gets that cold where you are, bypass it, why make it 180*F and then cool it down again

This is what I was debating, because I'm in Florida, keeping the transmission hotter when it's already hot? That just doesn't make sense to me.

 

I also bought the 6.0 ATF cooler, but I have to leave it in series with the Radiator cooler, it gets down to 0*F here at times, last winter it dropped to -20 and stayed there for 10 days..... Alaska type weather 🥶

 

Some 7.3s didn’t have the integrated radiator cooling from factory, mine was one of them. Personally I would put on a 6.0 cooler and remove the radiator cooling, it’s one less issue to worry about. There’s no chance coolant will ever get into your trans if you remove it


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