 |
|
|
|
Next: Mustang Mania 2006 - Tucson, AZ
|
| Author |
Message |
External
Since: Oct 23, 2003
Posts: 380
|
(Msg. 1) Posted: Sat Feb 25, 2006 10:20 pm
Post subject: Help needed for '84 Chevy Celebrity - where is vacuum modula
Archived from groups: alt>autos>gm (more info?)
|
|
|
Hi All,
I have a 2.8L carbureted Celebrity wagon with a 3 speed automatic. I've
been having some shifting trouble from 2'd
gear to 3rd gear. On level pavement it's fine, but if I go up a slight hill
at around 35mph, the transmission acts like
it can't decide whether to stay in 2nd gear or shift to 3rd gear. It will
shift back and forth. If I gun it, it will shift
to 2nd and stay there. But if I just give it a bit of gas to go up the hill
normally, it will shift back and forth between
gears. This started happening about a month ago.
Anyway I thought I would check the transmission vacuum modulator just to
see if the vacuum line had
come off or was split or if the diaphram was bad. The factory service
manual shows it's supposed to be
right at the front of the transmission - but there is nothing there on my
car, no port for it, no vacuum lines,
no nothing.
Does this car even have one? Does anyone have any other suggestions? The
fluid level is correct and color
is good.
Ted |
|
| Back to top |
|
 | |
External
Since: Jul 08, 2003
Posts: 41
|
(Msg. 2) Posted: Sun Feb 26, 2006 9:55 am
Post subject: Re: Help needed for '84 Chevy Celebrity - where is vacuum mo [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
In article ,
"Ted Mittelstaedt" wrote:
> Hi All,
>
> I have a 2.8L carbureted Celebrity wagon with a 3 speed automatic. I've
> been having some shifting trouble from 2'd
> gear to 3rd gear. On level pavement it's fine, but if I go up a slight hill
> at around 35mph, the transmission acts like
> it can't decide whether to stay in 2nd gear or shift to 3rd gear. It will
> shift back and forth. If I gun it, it will shift
> to 2nd and stay there. But if I just give it a bit of gas to go up the hill
> normally, it will shift back and forth between
> gears. This started happening about a month ago.
>
> Anyway I thought I would check the transmission vacuum modulator just to
> see if the vacuum line had
> come off or was split or if the diaphram was bad. The factory service
> manual shows it's supposed to be
> right at the front of the transmission - but there is nothing there on my
> car, no port for it, no vacuum lines,
> no nothing.
>
> Does this car even have one? Does anyone have any other suggestions? The
> fluid level is correct and color
> is good.
>
> Ted
No vacuum modulator on the THM-125.
Check the TV cable and the governor. |
|
| Back to top |
|
| |
External
Since: Nov 18, 2005
Posts: 76
|
(Msg. 3) Posted: Sun Feb 26, 2006 11:55 am
Post subject: Re: Help needed for '84 Chevy Celebrity - where is vacuum mo [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
Tranny probally getting weak, mine done the same thing just before it
started shuddering on take off and shifting, then it started slipping and
then it went out
"Neil Nelson" wrote in message
> In article ,
> "Ted Mittelstaedt" wrote:
>
>> Hi All,
>>
>> I have a 2.8L carbureted Celebrity wagon with a 3 speed automatic.
>> I've
>> been having some shifting trouble from 2'd
>> gear to 3rd gear. On level pavement it's fine, but if I go up a slight
>> hill
>> at around 35mph, the transmission acts like
>> it can't decide whether to stay in 2nd gear or shift to 3rd gear. It
>> will
>> shift back and forth. If I gun it, it will shift
>> to 2nd and stay there. But if I just give it a bit of gas to go up the
>> hill
>> normally, it will shift back and forth between
>> gears. This started happening about a month ago.
>>
>> Anyway I thought I would check the transmission vacuum modulator just
>> to
>> see if the vacuum line had
>> come off or was split or if the diaphram was bad. The factory service
>> manual shows it's supposed to be
>> right at the front of the transmission - but there is nothing there on my
>> car, no port for it, no vacuum lines,
>> no nothing.
>>
>> Does this car even have one? Does anyone have any other suggestions?
>> The
>> fluid level is correct and color
>> is good.
>>
>> Ted
>
> No vacuum modulator on the THM-125.
>
> Check the TV cable and the governor. >> Stay informed about: Help needed for '84 Chevy Celebrity - where is vacuum modu.. |
|
| Back to top |
|
| |
External
Since: May 02, 2004
Posts: 348
|
(Msg. 4) Posted: Sun Feb 26, 2006 1:55 pm
Post subject: Re: Help needed for '84 Chevy Celebrity - where is vacuum mo [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
It would probably be a good idea to change the screen and fluid. Has it ever
been done?
"Ted Mittelstaedt" wrote in message
> Hi All,
>
> I have a 2.8L carbureted Celebrity wagon with a 3 speed automatic. I've
> been having some shifting trouble from 2'd
> gear to 3rd gear. On level pavement it's fine, but if I go up a slight
> hill
> at around 35mph, the transmission acts like
> it can't decide whether to stay in 2nd gear or shift to 3rd gear. It will
> shift back and forth. If I gun it, it will shift
> to 2nd and stay there. But if I just give it a bit of gas to go up the
> hill
> normally, it will shift back and forth between
> gears. This started happening about a month ago.
>
> Anyway I thought I would check the transmission vacuum modulator just to
> see if the vacuum line had
> come off or was split or if the diaphram was bad. The factory service
> manual shows it's supposed to be
> right at the front of the transmission - but there is nothing there on my
> car, no port for it, no vacuum lines,
> no nothing.
>
> Does this car even have one? Does anyone have any other suggestions?
> The
> fluid level is correct and color
> is good.
>
> Ted
>
> >> Stay informed about: Help needed for '84 Chevy Celebrity - where is vacuum modu.. |
|
| Back to top |
|
| |
External
Since: Oct 23, 2003
Posts: 380
|
(Msg. 5) Posted: Mon Feb 27, 2006 12:48 am
Post subject: Re: Help needed for '84 Chevy Celebrity - where is vacuum mo [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"Woody" wrote in message
> It would probably be a good idea to change the screen and fluid. Has it
ever
> been done?
>
I did that 2 years ago, as well as flushed the trans with the usual detach
cooler line
and put it in a bucket, then idle the car and pour in trans fluid into the
dipstick
at the same rate that the trans was pumping it out method.
The prior owner claimed that he had rebuilt the transmission. I am not sure
of
how many miles had elapsed since that happened. Could have been quite a
few.
I'm pretty sure the car had 220K on it when I bought it. (the odo shows only
5 digits plus the 10th of the mile)
Ted >> Stay informed about: Help needed for '84 Chevy Celebrity - where is vacuum modu.. |
|
| Back to top |
|
| |
External
Since: Oct 23, 2003
Posts: 380
|
(Msg. 6) Posted: Mon Feb 27, 2006 12:51 am
Post subject: Re: Help needed for '84 Chevy Celebrity - where is vacuum mo [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"Adam" wrote in message
> Tranny probally getting weak, mine done the same thing just before it
> started shuddering on take off and shifting, then it started slipping and
> then it went out
>
Well, that wouldn't surprise me, this trans also has that infamous "jet
plane whine"
under accelleration which indicates the converter wasn't properly shimmed,
if I
remember correctly.
Ted >> Stay informed about: Help needed for '84 Chevy Celebrity - where is vacuum modu.. |
|
| Back to top |
|
| |
External
Since: Oct 23, 2003
Posts: 380
|
(Msg. 7) Posted: Mon Feb 27, 2006 1:30 am
Post subject: Re: Help needed for '84 Chevy Celebrity - where is vacuum mo [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
wrote in message
>
> ========
> ========
> > "Ted Mittelstaedt" wrote:
> >
> > > Hi All,
> > >
> > > I have a 2.8L carbureted Celebrity wagon with a 3 speed automatic.
I've
> > > been having some shifting trouble from 2'd
> > > gear to 3rd gear. On level pavement it's fine, but if I go up a
slight hill
> > > at around 35mph, the transmission acts like
> > > it can't decide whether to stay in 2nd gear or shift to 3rd gear. It
will
> > > shift back and forth. If I gun it, it will shift
> > > to 2nd and stay there. But if I just give it a bit of gas to go up
the hill
> > > normally, it will shift back and forth between
> > > gears. This started happening about a month ago.
> > >
> > > Anyway I thought I would check the transmission vacuum modulator
just to
> > > see if the vacuum line had
> > > come off or was split or if the diaphram was bad. The factory service
> > > manual shows it's supposed to be
> > > right at the front of the transmission - but there is nothing there on
my
> > > car, no port for it, no vacuum lines,
> > > no nothing.
> > >
> > > Does this car even have one? Does anyone have any other
suggestions? The
> > > fluid level is correct and color
> > > is good.
> > >
> > > Ted
>
>
> > Neil Nelson wrote:
>
> > No vacuum modulator on the THM-125.
> >
> > Check the TV cable and the governor.
>
> ======
> ======
>
> No modulater.
>
>
>
> Suggestion.......
> An adjustment on the TV cable may make the
> symptom go away, if you can adjust it out to a point
> where it doesn't raise the shift points too high during
> normal driving.
>
> That's the only thing you can do yerself,
> the rest is involved to the point of being mute.
>
Thanks for the suggestion. I have R&R'd transmissions before
and I have a transmission jack and cherry picker and all that,
but I don't like doing that involved a project during the winter,
it's too cold. And if I did R&R it I would probably take it to
a shop to be rebuilt or get one from a wrecker.
Ted >> Stay informed about: Help needed for '84 Chevy Celebrity - where is vacuum modu.. |
|
| Back to top |
|
| |
External
Since: Dec 13, 2004
Posts: 2
|
(Msg. 8) Posted: Mon Mar 06, 2006 4:18 am
Post subject: Re: Help needed for '84 Chevy Celebrity - where is vacuum mo [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
|
|
| Back to top |
|
| |
| Related Topics: | Old Chevy Celebrity - I have an 87 chevy celebrity that stalls when I'm slowing down. I need to locate the TCC solenoid so that I can unplug this to troubleshoot the problem, but I don't have a scematic of the engine, anyone know where to find it?
1990 Chevy Celebrity Engine Failure - Hello, I have a 1990 Chevy Celebrity Wagon V6 3.1 L The car has a check engine light on and the spedometer does not work. The engine also races and sometimes stalls. Meanwhile, sometimes the light is out and then the spedometer starts to work again,....
EGR vacuum modulator on 2001 Chevy Prizm - Could someone tell me where to find the EGR vacuum modulator on 2001 Prizm? I am looking at a picture and a drawing of it in a Haynes manual, so I know what it looks like. And it's a familiar-looking device-- I've seen the same thing (or similar things...
90 Celebrity Wagon - fuel problem? - 1990 Chevy Celebrity Wagon, 3.1 engine, MPFI I'm stuck trying to figure this out. Here's a little history. Sorry, it's a little long, but I want to give you all the info I have. I started to lose most of my power intermitently while driving. Not a..
What vacuum for your car are you using.... - that you like. Want something small, easy to carry around, great suction, and not awkward to use inside the vechicle. So do you have something you like, and what is it? -- Paul O. oplholik@gmail.com |
|
You can post new topics in this forum
You can reply to topics in this forum
You can edit your posts in this forum
You can delete your posts in this forum
You can vote in polls in this forum
|
|
|
|
|
|
|
FAQ
Search
Profile
Private Messages
Log in
