As far as the adjustment, the screw is inside the tube where the vacuum line pushes on the modulator. Like CPT sai turn it in for a quicker shift . I want to adjust my modulator to get the shifts to come a little later.
If you do, simply unplug the vacuum line at the valve and insert a small . Also, the modulator is hooked up and I screwed the adjustment in . T-4Modulator or Governor Upshift? Mar 2010T- 3Kick Down cable adjustment?
Jul 19- I tried to adjust the vaccuum modulator on my TH 3in my Z28. If I was you I’d rebuild (if needed) the turbo 400. I have used the 3engine and turbo 3transmission out of a heavy. The modulator screw is right beind the vacuum hose, just remove the . Simply adjust the screw inside the vacuum nipple for more or less diaphragm pre-load. The speed Turbohydramatic 3and its big brother the TH4were some of GM’s.
Aftermarket vacuum modulators have an adjustment screw inside that can . I think the adjustable Vac modulators only have a 3-5mph range. Sounds like you need the Governor calibration kit to adjust your shift points.
