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

ray_mcavoy · 12-15-2018, 01:04 PM

You're welcome!

I looked at a number of different relays, but I think the one we finally ended up using was a Standard Motor Products RY-12.

It is a common 5-terminal relay with both N.C. (normally closed) and N.O. (normally open) contacts inside a metal case with a built-in mounting tab. However, the terminal numbering isn't the same as a typical plastic case automotive relay. This one has terminal #1 as the common contact, #2 is the N.C. contact, #3 is the N.O. contact, and #4 & #5 are the coil. It has 1/4" wide blade terminals that will accept Packard/Delphi 56-series connectors for a factory installed look, or can be used with generic 1/4" quick connect terminals.

12-15-2018, 01:04 PM	#14
ray_mcavoy Registered User Join Date: Nov 2009 Location: Sherman, ME Posts: 2,354	Re: 3 speed overdrive with an HEI distributor You're welcome! I looked at a number of different relays, but I think the one we finally ended up using was a Standard Motor Products RY-12. It is a common 5-terminal relay with both N.C. (normally closed) and N.O. (normally open) contacts inside a metal case with a built-in mounting tab. However, the terminal numbering isn't the same as a typical plastic case automotive relay. This one has terminal #1 as the common contact, #2 is the N.C. contact, #3 is the N.O. contact, and #4 & #5 are the coil. It has 1/4" wide blade terminals that will accept Packard/Delphi 56-series connectors for a factory installed look, or can be used with generic 1/4" quick connect terminals.