94 A4LD Vacuum Modulator Replacement

I have determined that the vacuum modulator is defective (tranny fluid in
the vacuum hoses) and have a replacement ($37.50) to install.

I removed the passenger seat and console and peeled the carpet up to expose
an access cover on top of the tranny hump.

It appears one bolt/stud secures the modulator and a heat shield of sorts.

My question is: Knowing there is a pushrod when I pull the modulator, can
this rod be lost inside the tranny case or is it more likely to simply fall
out upon removal of the modulator?\

Thanks in advance.

The pin fits in a recess in a spool valve and can't fall into the trans....
they do, however, like to fall into a place either inaccessible or crude.

For the curious, the vacuum modulator, pin and spool valve 'modulates'
transmission line pressure using engine vacuum to indicate the amount of
load on the engine. Low vacuum drives the line pressure high to prevent
slipping bands and/or clutches. High vacuum indicates light engine loading
and drives line pressure low - this reduces the horsepower required to run
the transmission pump and allows for a softer shift feel.

HTH


"rj" > wrote in message
m...
>I have determined that the vacuum modulator is defective (tranny fluid in
> the vacuum hoses) and have a replacement ($37.50) to install.
>
> I removed the passenger seat and console and peeled the carpet up to
> expose
> an access cover on top of the tranny hump.
>
> It appears one bolt/stud secures the modulator and a heat shield of sorts.
>
> My question is: Knowing there is a pushrod when I pull the modulator, can
> this rod be lost inside the tranny case or is it more likely to simply
> fall
> out upon removal of the modulator?\
>
> Thanks in advance.
>
>

Thanks!

"Jim Warman" > wrote in message
news:FSJyd.18477$dv1.17855@edtnps89...
> The pin fits in a recess in a spool valve and can't fall into the
trans....
> they do, however, like to fall into a place either inaccessible or crude.
>
> For the curious, the vacuum modulator, pin and spool valve 'modulates'
> transmission line pressure using engine vacuum to indicate the amount of
> load on the engine. Low vacuum drives the line pressure high to prevent
> slipping bands and/or clutches. High vacuum indicates light engine loading
> and drives line pressure low - this reduces the horsepower required to run
> the transmission pump and allows for a softer shift feel.
>
> HTH
>
>
> "rj" > wrote in message
> m...
> >I have determined that the vacuum modulator is defective (tranny fluid in
> > the vacuum hoses) and have a replacement ($37.50) to install.
> >
> > I removed the passenger seat and console and peeled the carpet up to
> > expose
> > an access cover on top of the tranny hump.
> >
> > It appears one bolt/stud secures the modulator and a heat shield of
sorts.
> >
> > My question is: Knowing there is a pushrod when I pull the modulator,
can
> > this rod be lost inside the tranny case or is it more likely to simply
> > fall
> > out upon removal of the modulator?\
> >
> > Thanks in advance.
> >
> >
>
>