The relay is anything but typical old style. There is a small circuit board inside that handles the switching. This Part (P/N MB510483 ) is no longer in production. Not surprising since we are talking about a 30 year old truck. Well, I'm one of those guys who like to keep the old one going and I've brought some old ones back to life that others have given up on. That is probably strange to some. To me its challenging and fun.

So, I've by-passed the relay board. Power now goes directly to the solenoid. The transmisssion up shifts and down shifts just like it should. What is lost by doing this is a check to see that the engine is warmed up (signal coming to the relay board from a coolant temperature sensor) and the ability to shift out of OD manually with the button on the shifter. NOT a big loss in my opinion.

Fine to go now ! If, I ever find a replacement relay, I can put the configuration back to stock, but, I see no big rush to do so.

Enjoy your rigs!