I checked my own diaphragm, and it's also bad... looked fine at first glance.

I could make it work manual as you suggested.
But I will buy the gear from EBAY so at least it's correct in HIGH gear.



My Chevy Viking 1959

Ulf Hedlund. Eskilstuna. Sweden
[email protected]
Also:
Ford Galaxie 4 dr 1959
Ford Custom 4 dr 1964
Ford Mustang GT 2005