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- Apr 13, 2012
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I am changing over to A/C in my 1970 Charger. Part of the changeover includes a new radiator. These days, the radiators are thicker than our originals. I had a generic Griffin in the car but changed to a Speedcooling 26" unit. My thermo fan clutch was now too close to the core. Oddly, the bottom is about 1/4" from the radiator and the top is about 1 1/4". The car has never been wrecked and the transmission is at the right angle.
I looked through my stash of parts and found 2 original Mopar fan clutches that have a shorter neck/shaft than the one I had on the car. The shortest shaft fit the car great but is ugly and dirty. My understanding is that Originals have holes, aftermarket units have slots. I am certain that they came from late 80s RWD cars, either Diplomats or Fifth Avenue cars. At the local NAPA store, they list a Hayden 2747 as the correct unit but the shaft on it is the same as the one I already had on the car. I had to look online to learn of the Hayden 2947. I ordered one from Summit today.
I looked through my stash of parts and found 2 original Mopar fan clutches that have a shorter neck/shaft than the one I had on the car. The shortest shaft fit the car great but is ugly and dirty. My understanding is that Originals have holes, aftermarket units have slots. I am certain that they came from late 80s RWD cars, either Diplomats or Fifth Avenue cars. At the local NAPA store, they list a Hayden 2747 as the correct unit but the shaft on it is the same as the one I already had on the car. I had to look online to learn of the Hayden 2947. I ordered one from Summit today.