OK, it's kinda vague, but it basically says that you can only raise or lower the shift points 2 - 5 mph. Turning the screw clockwise will make it shift later and crisper. Turning counter-clockwise will make it shift earlier and softer. One full turn of the screw will change the modulator pressure by 2 - 3 psi. What it doesn't say is how many times you can or should turn the screw... I'd maybe try turning it clockwise one full turn and see what happens.
Submitted by: Blaine Sanders