Quote:
Originally Posted by dude99
As far as I'm aware the vacuum amplifier (blue flying saucer) varies the vacuum being fed to the transmission modulator based on boost levels. This would allow the transmission to firm up the shifts under boost (more power being produced) and reduce slip\wear.
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Interesting...so the boost signal overrides all or part of the throttle position signal to vary the amount of modulation to the transmission.
I was running the blue-flying-saucer setup with my replacement 722.3x tranny for awhile and there was no discernible difference when I unhooked it and went with the "stock" 722.3x setup with just the VCV controlling modulation. I would take this to mean that the modulation curve on the 722.4x transmission is different allowing it to take advantage of the "vacuum amplifier" function.
Thanks