I have been having the same issue. I have a stock KA and my original fan clutch started doing exactly what yours did at around 197K. Replaced it with a duralast one and it didn't roar all the time but wasn't as quiet as the original. I never heard the original. Then replaced it with 2 oem ones and same thing. Nothing different. If I come off the highway to slower speeds I can hear them and have lack of power. If temperature is below 40F I don't here them but I hear them if the engine just gets close to normal operating temp. They all seem to be more sensitive.
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z32 front brakes, spl tc rods
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