| Re: [GMCnet] tranmission modulator [message #317792 is a reply to message #317789] |
Fri, 19 May 2017 09:06   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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What turning that Allen screw does is put more tension on a spring that
balances against the force from the vacuum operated diaphram. The harder
you press down on the gas, the less vacuum you have available to move the
diaphram, and the spring becomes the dominant force. Shift point moves up,
and shift becomes a bit harsher. If you feel it is shifting too harsh, back
off the adjustment screw a bit. 1-2 up shift at light throttle occurs when
all is correct at 8 to 14 mph, give or take. 2-3 shift, 25 -35 or so. If
you mash the throttle, then it won't up shift until the governor forces the
shift.
Jim Hupy
Salem, Or
78 GMC ROYALE 403 w/a Manny tranny that shifts harshly when the throttle is
down. How I like it.
On May 19, 2017 6:26 AM, "Johnny Bridges via Gmclist" <
gmclist@list.gmcnet.org> wrote:
> Probably not, but invoke Standard Transmission Info Source #1: Call or
> email Manny.
>
> --johnny
> --
> 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
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