Need A Decent Clutch Fan For A 1970 Chevelle

Grumpy

The Grumpy Grease Monkey mechanical engineer.
Staff member
Last edited:
For what it is worth I just went through this for my ‘68 Camaro with great success.
I’m confident the part number provided by Grumpy will work.
If you are looking for other options perhaps this will help.

My goal was to convert the Flex fan to a GM 7 blade unit with a fan clutch.
The hard part was to find the correct clutch.The OE part number was 3946050.
Finding the OE part number was the key and from there I worked backwards looking for a heavy duty part with the same measurements.
Introducing...Standard Motor Parts (SMP) as one of the largest manufacturers of units and sell them under various brands (Hayden, 4Seasons, Murray, etc..).
Hayden offers a part number cross reference:
https://www.haydenauto.com/en

RockAuto happens to offer a dimension lookup table that I used to find a heavy duty part after identifying the replacement OE part.
http://www.rockauto.com/genImages/93/haydenSD-HD-SVRD.pdf
 
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