Jim Tiberio

I've got an '89 F150 with a 5.0 EFI and three speed auto. The problem is
that it is now a two speed. I leveled off the fluid but that didn't do the
trick. The truck is rarely ever driven at 55 MPH since I only use it for
local dump and Home Depot type runs. Last night I had to move a couch for a
friend, I got on the highway and realized it wasn't engaging third gear.
The previous owner had it re-built 20,000 miles ago. Is there a problem
inherent with these trannsmissions or the re-build of them that would cause
this? I just want to know a little about what I'm talking about before I
bring this $500 truck in for repair and get told it will be a $1000 fix.

TranSurgeon

check vac modulator line

unhooked/leaking - no third


"Jim Tiberio" <jimtiberio@hotmail.com> wrote in message
news:3n8k2qFcr88U1@individual.net...
> I've got an '89 F150 with a 5.0 EFI and three speed auto. The problem is
> that it is now a two speed. I leveled off the fluid but that didn't do
the
> trick. The truck is rarely ever driven at 55 MPH since I only use it for
> local dump and Home Depot type runs. Last night I had to move a couch for
a
> friend, I got on the highway and realized it wasn't engaging third gear.
> The previous owner had it re-built 20,000 miles ago. Is there a problem
> inherent with these trannsmissions or the re-build of them that would
cause
> this? I just want to know a little about what I'm talking about before I
> bring this $500 truck in for repair and get told it will be a $1000 fix.
>
>

Jim Tiberio

"TranSurgeon" <nobulltrans@mchsi.dotcom> wrote in message
news:pYEPe.67327$084.37536@attbi_s22...
> check vac modulator line
>
> unhooked/leaking - no third

Thanks for the quick response, I'll do it when I get home. Sooo, uhhh
where exactly is the vac modulator line?

>
> "Jim Tiberio" <jimtiberio@hotmail.com> wrote in message
> news:3n8k2qFcr88U1@individual.net...
>> I've got an '89 F150 with a 5.0 EFI and three speed auto. The problem is
>> that it is now a two speed. I leveled off the fluid but that didn't do
> the
>> trick. The truck is rarely ever driven at 55 MPH since I only use it for
>> local dump and Home Depot type runs. Last night I had to move a couch
>> for
> a
>> friend, I got on the highway and realized it wasn't engaging third gear.
>> The previous owner had it re-built 20,000 miles ago. Is there a problem
>> inherent with these trannsmissions or the re-build of them that would
> cause
>> this? I just want to know a little about what I'm talking about before I
>> bring this $500 truck in for repair and get told it will be a $1000 fix.
>>
>>
>
>

TranSurgeon

modulator is thelittle can thing sticking out at right rear of transmission,
on the back edge

line goes from there to manifold vac source


"Jim Tiberio" <jimtiberio@hotmail.com> wrote in message
news:3n8kfuFco36U1@individual.net...
>
> "TranSurgeon" <nobulltrans@mchsi.dotcom> wrote in message
> news:pYEPe.67327$084.37536@attbi_s22...
> > check vac modulator line
> >
> > unhooked/leaking - no third
>
> Thanks for the quick response, I'll do it when I get home. Sooo, uhhh
> where exactly is the vac modulator line?
>
> >
> > "Jim Tiberio" <jimtiberio@hotmail.com> wrote in message
> > news:3n8k2qFcr88U1@individual.net...
> >> I've got an '89 F150 with a 5.0 EFI and three speed auto. The problem
is
> >> that it is now a two speed. I leveled off the fluid but that didn't do
> > the
> >> trick. The truck is rarely ever driven at 55 MPH since I only use it
for
> >> local dump and Home Depot type runs. Last night I had to move a couch
> >> for
> > a
> >> friend, I got on the highway and realized it wasn't engaging third
gear.
> >> The previous owner had it re-built 20,000 miles ago. Is there a
problem
> >> inherent with these trannsmissions or the re-build of them that would
> > cause
> >> this? I just want to know a little about what I'm talking about before
I
> >> bring this $500 truck in for repair and get told it will be a $1000
fix.
> >>
> >>
> >
> >
>
>

lugnut

On Fri, 26 Aug 2005 09:35:14 -0400, "Jim Tiberio"
<jimtiberio@hotmail.com> wrote:

>I've got an '89 F150 with a 5.0 EFI and three speed auto. The problem is
>that it is now a two speed. I leveled off the fluid but that didn't do the
>trick. The truck is rarely ever driven at 55 MPH since I only use it for
>local dump and Home Depot type runs. Last night I had to move a couch for a
>friend, I got on the highway and realized it wasn't engaging third gear.
>The previous owner had it re-built 20,000 miles ago. Is there a problem
>inherent with these trannsmissions or the re-build of them that would cause
>this? I just want to know a little about what I'm talking about before I
>bring this $500 truck in for repair and get told it will be a $1000 fix.
>


I am assuming you mean it is not upshifting as opposed to
going to "nuetral" in which case you have an entirely
different problem. If it is a 3 speed, you may have a stuck
road speed governor. It is located in the tailshaft
housing. IIRC, it can be service (unstuck) by removing the
ts housing. It is not a 10 minute job, but, it is not too
bad or complicated if you have a few tools and are willing
to learn as you go. You might also want to check your
kickdown to be sure it is not stuck at full throttle
position for some reason.

Lugnut