Siren Sounds

[Wombo]

I think I figured out what is causing the siren sounds. I was towing this weekend and it did it again, only when I was under power going uphill (It was also 115 F outside)

It must be the fan clutch!

It does change speeds with the engine.
It also fluctuates on it's own.
It sounds like the fan sound on my '67 Ch**y.

Anyway, I'm going to bring it up with the dealer and see if there is any fix.

j

[psd4me]

It is normal, I have heard about it from many people prior to getting my truck. It does it on mine when I am going up a steep hill, or when it is really hot outside. It is a weird sounding pattern...on..on..on..on..on. Sounds like something is turning if off and on over and over again.

Rest assures that it is common.

Check out these comments:
http://www.ford-trucks.com/forums/sh...ght=fan+noise+

[Wombo]

Thanks. That makes me feel better. I'm going on a long trip to Montana and I didn't want any surprises.

[4174911]

Oh Yeah the Notorius Fan Clutch. The first time i heard that thing i was hauling my jeep to Big Bear and the Fan Clutch engaged. My wife and i looked at each other and said what in the [censored] is that???????? it is startling loud when i arrived in Big Bear i called the Service Writer at my dealership to ask wha the [censored] the noise could be?? They laughed sort of and confirmed my beliefs. But you are right man that thing is something else. You'll be glad you have it someday. A short story; 3weeks ago hauling boat to river going out hwy 15 the turbo to intercooler hose tore(unbeknownest to me) the truck ran bad (like i'm selling this thing when i get home bad) Well to make a long story short i listened to that damn fan clutch for the entire drive there and back. As it turns out the thing is worth it's wait in gold even though it noisy as [censored]. beacsue the turbo hose was torn almost in half. thus creating a ton of under hood temperature.