Is this a belt driven fan with a thermal clutch on it? -OR- is it a hydraulic driven fan?
I think the Hemi has the Hydrualic driven fan.
There is a test to see if the fan clutch is bad, but the fan clutch has to be really bad to fail the test. Basically, with the engine off, give the fan a push and see if it will spin on its own, more than a whole turn on its own, then the clutch is bad. A good fan clutch won't go more than a few degrees of turn after a push, so I imagine a fan clutch would have to be in really bad shape if it can turn a whole turn. And it could develope a squeek before it got that bad.
The serpentine belt can cause squeeks, even if they look good. The key is if they have worn enough to open up inbetween each "V" Rib. The belt can look likes its in good shape, but NOT until you compare it with a new belt, do you see that its worn the grooves wider in the valley's of the "V" ribs that you can notice the wear. I spent a lot of money replacing accessories on my min-van before I discovered it was the Serpentine belt, that looked like it was in good shape, that was actually making the squeeking noise. And the serpentine belt is cheaper than the fan clutch, and you'll eventually have to replace it, so might as well do it before buying a fan clutch and see what happens.
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