85_Ranger4x4
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I think the reason why our efans run all the time is because of the switches location. Been thinking about it and maybe putting it on the lower rad hose is the solution. If the fluid coming out of the rad is to hot, then the fan will have to kick on. But if not to the temp that activates the switch, it will stay off.
If it stays on top on the coolant neck, it will just sit in hot coolant keeping it on.
But then I add a kinda wussy mechanical fan and it very rarely runs at all...

I do agree we are missing something. I can kinda see my compromised system struggling (4.0 radiator, bunch of tranny coolers, and pusher efan) but you have an OEM 5.0 radiator and a huge OEM puller fan that is probably cooling about as many 5.0 Mustangs at this point as it is 3.0 Tauruses. You shouldn't be having a problem.