If you have some Fabrication skills you can make a Transmission cooler out of an AC condenser I did this on a diesel Suburban and had to install a thermostat to get the temperature back up

 

Very interesting. Paying a professional welder to weld 2 fittings +new AC condenser still less than buying a new 6.0 trans cooler.

Do you think the lines in the radiator are about the same size so oil flow will not be an issue?

 

Are stacked plate coolers that much more efficient than tube and fin?

 

Yes they are.

 

How much more does a 6.0 cooler cool over a V10 cooler ?
V10 cooler is 14 rows

 

A lot more then a V10 cooler. A 6.0 cooler is 26 rows and it won't get over 180*.

 

I swapped my stock V-10 cooler for a 32 row Dorman 6.0 cooler. I tow a 12K TT all over the Eastern states and with the stocker I saw trans temps over 200* a handful of times, but never over 210* and it always cooled right back down when the hill was topped. Now with the 6.0 cooler it runs at least 20* cooler under all situations and 185*-ish is about as high as it has been pulling a long step grade, 175/180* is pretty typical for most towing miles now with the bigger cooler. It was a nice easy upgrade (done during a full trans flush) that really wasn't needed but we do have some longer Western trips planned in the next few years that will see some bigger mountains and longer grades so I made the upgrade now just as a precaution.

 

Short answer is a lot more. The 6.0 cooler doesn't let the temp spike up on climbs like the stock cooler would, it goes up a few degrees but that about it.
I do recommend doing a full trans flush if you are near the change interval or don't know the age of your ATF.
Are you seeing high temps with your stock V-10 cooler now? How high? Don't rely on the dash cluster trans temp gauge if towing, it's really just a fancy 3 position idiot light, get something aftermarket to see the true trans temp.

 

Thanks for the reply. I put a V10 cooler on the 4.6 2000 F150 last year. Threw out the stock cooler.
I moved to a hot climate and did the upgrade after seeing others do it in similar hot climates.
I was looking at the 6.0 cooler but it didn't look like there was enough room in there.

With the stock cooler on the 10th gen Fords. It is a bit over 2" thick but it's surface area is 11" width and 4.5 " height. It's thick !

Now is it the surface area of a cooler that affects cooling or does thickness of cooler come into play as well.

I have been hauling 2200 lbs in the bed for a lot of trips, felt the transmission lines going to cooler and it didn't even break a sweat. I think I'm far from running hot.
here are pics of the upgrade.

 

This was the stock cooler on the 10th Gen....
thicker compared to the V10 cooler. But the V10 cooler has more surface area.