I have an old Chevy pickup with 454 engine and 3 speed THM400.
I just put a new tranny modulator in it as old one leaked and allowed tranny fluid to get past diaphragm.
New one is Fram FM2321, with green stripe, same as my old one. It is adjustable, as was the old one. Does anyone know which way to turn the screw, and what to look for?
Regards,
Henry