| Tranny issue [message #199486] |
Sat, 23 February 2013 16:42  |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
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I was recently bragging on how sweet my tranny was and I guess I cursed it or something.
Today, while doing my test drive to see if the engine came to temp, I noticed the tranny was shifting harder than it has been and winding longer before it shifts. The longer I drove the worse it got and by the time I got home, it wants to stay in first a good bit past the normal shift point. Also if I let off it would normally shift into second but it is staying in first. If I get going, it eventually shifts into second and then third.
I checked the fluid and it was a pint low but acts the same after adding the fluid.
Is this the dreaded governor gear or something else?
I'm falling into the two steps forward, three steps back dance.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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| Re: Tranny issue [message #199489 is a reply to message #199486] |
Sat, 23 February 2013 16:52  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Kerry, check the plastic gear at the end of the governor. It may have stripped a Tooth, or worn several low spots on the teeth. Gear is less than $10.
Most of us carry a spare one in the coach. One of those things which are much easier to get when you don't need it. Post if you need the part number, I'll go outside and look at my spare.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Tranny issue [message #199490 is a reply to message #199486] |
Sat, 23 February 2013 16:50 |
Marc Hogenboom[2]
Messages: 70
Registered: March 2011
Karma: 0
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Check the vacuum, a little leak can cause strange effects.
Marc Hogenboom
'73 Painted Desert Diesel
Madrid NM
-----Oorspronkelijk bericht-----
From: Kerry Pinkerton
Sent: Saturday, February 23, 2013 3:42 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Tranny issue
I was recently bragging on how sweet my tranny was and I guess I cursed it
or something.
Today, while doing my test drive to see if the engine came to temp, I
noticed the tranny was shifting harder than it has been and winding longer
before it shifts. The longer I drove the worse it got and by the time I got
home, it wants to stay in first a good bit past the normal shift point.
Also if I let off it would normally shift into second but it is staying in
first. If I get going, it eventually shifts into second and then third.
I checked the fluid and it was a pint low but acts the same after adding the
fluid.
Is this the dreaded governor gear or something else?
I'm falling into the two steps forward, three steps back dance.
--
Kerry Pinkerton
North Alabama, near Huntsville,
77 Eleganza II, "The Lady", 403CI, also a 76 Eleganza being re-bodied as an
Art Deco car hauler
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| Re: [GMCnet] Tranny issue [message #199492 is a reply to message #199489] |
Sat, 23 February 2013 17:06 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Kerry, sounds like you knocked a vacuum line off when you were changing the
thermostat. Check the one that comes from the modulator to the engine. It
is metal most of the time from the modulator to the upper engine area, then
turns to hose. Easy to do, many have taken this journey before you.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Sat, Feb 23, 2013 at 2:52 PM, Thomas Phipps <tph1pp5@yahoo.com> wrote:
>
>
> Kerry, check the plastic gear at the end of the governor. It may have
> stripped a Tooth, or worn several low spots on the teeth. Gear is less
> than $10.
> Most of us carry a spare one in the coach. One of those things which are
> much easier to get when you don't need it. Post if you need the part
> number, I'll go outside and look at my spare.
> Tom, MS II
>
> --
> 1975 GMC Avion, under forever re-construction
> Vicksburg, MS. 3.7 miles from I-20
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
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| Re: Tranny issue [message #199493 is a reply to message #199486] |
Sat, 23 February 2013 17:14 |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
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Thanks, those two were my first options. Tom, I have the gear in my spares. I'll check the vacuum first. The engine vacuum shows strong ... it runs around 20 when cruising at 55.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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| Re: Tranny issue [message #199495 is a reply to message #199493] |
Sat, 23 February 2013 17:17 |
stick miller
Messages: 1036
Registered: March 2010
Location: Americus, Georgia
Karma: 0
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Kerry - sounds like the dreaded "transmission about to fail due to low operating temperature" syndrome. Just kidding. I have no idea what's wrong, but according to urban legend it is not serious.
Come see us.
Stick Miller
'78 Royale - "White Trash" - she left me for another man
'76 Eleganza - "Cousin Eddie" Sold
'84 Bluebird Wanderlodge - "Past Tents"
Americus, GA
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| Re: Tranny issue [message #199503 is a reply to message #199495] |
Sat, 23 February 2013 18:10 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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This sounds like a vacuum problem to the modulator. This can be caused by several things including the diaphragm broken in the modulator. The modulator is located on the passenger side of the trans and it is held in place with one bolt.
1. Verify the hose on the modulator is installed correctly and in good condition.
2. Pull the hose off of the modulator and verify that there is no oil in the hose. If there is oil in the hose this indicates that there is a leak in the diaphragm and that the modulator needs to be replaced.
3. That modulator hose goes to a thin steel pipe which goes up the back of the engine and across the passenger side of the intake manifold. On the manifold end of the pipe there is another hose. Check the condition and installation of that hose.
4. The steel pipe has also been known to get clogged with a bit of carbon or rust. Mine completed plugged up one time and I had to remove the pipe, attach an air hose with 100 PSI to it. Then with the air pressure on it I had to heat the first few inches cherry red with a torch to eventually open the clog.
Shifting pints are primarily controlled by the modulator, but the governor, and kick down switch also get involved. Others have already discussed the governor gear and governor. I doubt that is your problem but some (including Dan G.) have had governor problems cause your failure. With a bad gear the trans usually fails to ever shift out of first and the speedometer (driven by the same gear) stays at zero mph. I guess it is also possible to miss a tooth on the gear and still have it turn but I have never seen or heard of that failure.
As a test to eliminate the kick down switch, I would unplug it and see what happens. The switch is located under the dash on the top of the rod that the pedal is mounted on. Unplugging it will get it out of the picture. If unplugging it eliminates the problem, we can discuss fixing it in another posting.
Good Luck,
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
[Updated on: Sat, 23 February 2013 18:13] Report message to a moderator |
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| Re: [GMCnet] Tranny issue [message #199530 is a reply to message #199501] |
Sat, 23 February 2013 20:07 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Score another one for mr Hupy
Sully
77 royale
Seattle
Sent from my iPhone
On Feb 23, 2013, at 4:07 PM, Kerry Pinkerton <Pinkertonk@MCHSI.com> wrote:
>
>
> Well, that was easy :blush: :roll: The vacuum hose was off to the modulator. I had taken it off to change the fuel filter at the carb and while eating supper I remembered...sure enough. I'll test drive tomorrow but I'm confident that was it.
>
> Thanks for the advice guys.
> --
> Kerry Pinkerton
>
> North Alabama, near Huntsville,
>
> 77 Eleganza II, "The Lady", 403CI, also a 76 Eleganza being re-bodied as an Art Deco car hauler
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Tranny issue [message #199533 is a reply to message #199530] |
Sat, 23 February 2013 20:16 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Thanks Todd. I've been there, done that. Experience beats Engineering every
time. (very large grin) Kerry is one of the great ones. Any one who can
bump metal like he does is very rare indeed. Any time he needs a favor!!!
Jim Hupy
Salem, or
78 Gmc ROYALE 403
On Feb 23, 2013 6:08 PM, "Todd Sullivan" <sgltrac@gmail.com> wrote:
> Score another one for mr Hupy
>
> Sully
> 77 royale
> Seattle
>
> Sent from my iPhone
>
> On Feb 23, 2013, at 4:07 PM, Kerry Pinkerton <Pinkertonk@MCHSI.com> wrote:
>
> >
> >
> > Well, that was easy :blush: :roll: The vacuum hose was off to the
> modulator. I had taken it off to change the fuel filter at the carb and
> while eating supper I remembered...sure enough. I'll test drive tomorrow
> but I'm confident that was it.
> >
> > Thanks for the advice guys.
> > --
> > Kerry Pinkerton
> >
> > North Alabama, near Huntsville,
> >
> > 77 Eleganza II, "The Lady", 403CI, also a 76 Eleganza being re-bodied as
> an Art Deco car hauler
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Tranny issue [message #199674 is a reply to message #199672] |
Sun, 24 February 2013 18:04 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Senior Member |
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In the Third MAW it was the loose nut between the stick and the seat.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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The vacuum hose was off to the modulator. I had taken it off to change the fuel filter at the carb and while eating supper I remembered...sure enough. I'll test drive tomorrow but I'm confident that was it.
