3 speed overdrive with an HEI distributor - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**cwcarpenter98** · 12-13-2018, 07:52 PM

So I've been doing a lot of research on the stock wiring for a 3 speed overdrive trans, but I'm confused on how to make it work with my HEI dizzy. I want my trans to work just as GM intended, but I don't want to swap back to my points dizzy.

It makes sense to me that the coil is grounded out when the kickdown switch is pressed to take the load off the trans so the solenoid can pull it out of overdrive. What I am confused on is how to wire it to the HEI without burning up anything.

Please let me know if y'all have any suggestions, thanks

12-13-2018, 07:52 PM	#1
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,488	3 speed overdrive with an HEI distributor So I've been doing a lot of research on the stock wiring for a 3 speed overdrive trans, but I'm confused on how to make it work with my HEI dizzy. I want my trans to work just as GM intended, but I don't want to swap back to my points dizzy. It makes sense to me that the coil is grounded out when the kickdown switch is pressed to take the load off the trans so the solenoid can pull it out of overdrive. What I am confused on is how to wire it to the HEI without burning up anything. Please let me know if y'all have any suggestions, thanks __________________ Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson



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