This is a large thread. I am discovering the transmission vac control. The VCV is acting like a switch. There is no nice linear ramp of inverse inches of Hg v acc pedal position as I monitor line to the transmission modulator.

I pulled the VCV and opened it. 2 screws and the top comes off. There is a coil spring on the throttle input shaft which displaces a brass slug. There is a nut on a long sided nut. My question is can I adjust this to restore the linearity of control. Is there any data out there as to what the right performance curve (inverted In Hg V pedal depression %age) should be. If this has been discussed on here where is it at.

Any help much appreciated.

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Dionysius