CTX-SLPR said:
I don't think so... you'll hold vacuum in the modulator when the check valve closes rapidly and it pretty much eliminated the fuction of the modulator from the shifting equation which I wouldn't think would be a goodthing.
Ok than. How much vaccum will an engine have when you start getting into boost??? My vote is for 0 :biggrin: .
Of course it will be 0. The problem is that if it had a check valve in it, the modulator will still see vacuum when under part throttle or full boost. More vac at the modulator is less pressure in the trans. The modulator needs to have 0 or near 0 vacuum when under load to raise pressure high enough to keep it from slipping and burning up.