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I've attached a couple of pics of my solenoid/gasket and of the valve body it attaches to within transmission...
If i'm correct, when the solenoid is 'activated' it creates what i believe is called 'DET pressure' which acts on the 1 2 valve up in the valve body, thus kicking down?
How does the DET pressure get created?!
Re the little hole on underside of the solenoid - is this closed when solenoid is activated, and resulting vacuum or change of pressure - DET pressure - acts on the 1 2 vale? Or is a component missing and something else happens?