Thermal clutch noise

Try the standard duty clutch. Just make SURE that you buy the thermal style, not non-thermal. The non-thermal is essentially partially locked up all the time, so you will only increase the noise.

Somewhere, maybe on Hayden's website, there is an explanation of the difference between standard and HD thermal fan clutches as far as percentage of lockup goes.

I'm a firm believer in clutch fans and you said it all when you said your car "has never had cooling issues":cheers: