Re: Transmission update; borrowing Allen's pic

Posted by Allan in NE on July 30, 2005 at 06:22:35 from (148.78.243.25):

In Reply to: Transmission update; borrowing Allen's pic posted by MeAnthony on July 30, 2005 at 05:40:24:

Hey Anthony!

Now take 'er out and check your gas milage; you are going to be pleasantly surprised. :>)

That was back in the days when GM was scramblin' to smooth out that application of the converter clutch because owners were complaining that the darned transmission "shifted too often", so you'll see lots and lots of different configurations.

All the while, they had to met federal emmsion guidlines too.

If memory serves me, on your '86, they used two switches wired back to back. One was a normally open switch and the other was a normally closed switch to provide a balancing act to the solenoid because that transmission used as many as three pressure switches inside the transmission as well, which allowed the converter to come on 'just at certain times' in 2nd, 3rd and 4th gears depending on the operators' acceleration, deceleration, or cruise demands.

Also, along about this same time, they were playing with a solenoid control for the EGR valve instead of just using a simple ported vacuum source, as they went to the injection in '87.

I used to have all those circuits memorized, but it has just been too many years under the bridge.

Allan

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