Well we're just gonna have to disagree, No need to sick the moderator on me. I would associate the heat problem with several factors.
The extra weight placed on the front of the vehicle pushing a load
The final drive ratio "axle gears" in particular
Transmission heat load, coolers are in the radiator in factory form.
Cooling system properly rated
Plowing in 4hi or 4low?
Air flow would be far down on my list possibles because it is not heavily impeded, telling someone to just lock the fan up to me is a bit like...
someone asking why the tires on the back of their blazer are very squished with 2000lbs in the back.
the cheap simple solution would be to pump the tires up to 80lbs
Is this so you can have a good a laugh when they post back that their rear tires blew out?
Sorry that's the best parallel I could come up with..
A fan upgrade, fan clutch, thermostat, high flow v-belt waterpump, all things that would be WAY lower than that $1000.00 number you're throwing around.
Now that was a useful post. We can disagree and give out good information without having a pissing match.


So I will just say don't be that guy..