Re: Ford Alternator
In my experience, some of the HD clutches never really freewheel like they should when cool. Went through that on my truck when the OEM one finally gave up. First replacement was a HD clutch that kept the fan spinning so fast it sounded like a low flying plane. Found a standard duty clutch and things are much quieter now and no temp problems.
GM also has a more modern family of alternators(CS?) that can make 130A. You might have to switch pulleys and alt fans as I think most are from serpentine setups and spin the wrong way. Or you could look at switching to a serpentine setup if you can find one in a salvage yard.
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