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Hydromatic Transmission issues, 1956 Cadillac CDV

Started by Christopher Petti, May 09, 2011, 10:53:49 PM

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Stenv-dk

#20
April 26, 2016, 04:08:43 PM
Hello.

I'm from Denmark.
I have the same trouble on my 1957 Cadillac  :o
What did you do to get driving well again?
Sorry for my School english.

Sten Vedel
Silkeborg
Denmark
Europe

Christopher Petti

#21
April 26, 2016, 05:34:04 PM
Sten,
  Wow this post is old I forgot about writing it. I didn't forget about writing the check for the rebuild on my transmission.  What happened Sten waa the seals went on a 150 mile trip. 300 miles round trip. So on tge from Detroit to Cleveland the seals went and I lost some fluid. Then on the trip home I lost a lot more fluid.  After that I ended up biting the bullet and taking it to a transmission specialist.  He took it apart,  said I had burnt clutches and worn bands. Also a gear had been worn very badly and needed replacing. All a result of my transmission seals going and losing lots of fluid. I would have a specialist look at it. That is a complicated transmission.  Is the car hang shifting? Could be your trunion cable as well. If the cable from your transmission to your carb isn't set correctly the transmission will not shit at the correct RPM. Good luck, tell me what you find!

Chris
And uses too much gas
Some folks say it's too old
And that it goes too fast
But my love is bigger than a Honda
It's bigger than a Subaru
Hey man there's only one thing
And one car that will do
Anyway we don't have to drive it
Honey we can park it out in back
And have a party in your pink Cadillac

TJ Hopland

#22
April 26, 2016, 05:45:22 PM
Any idea the last time yours was rebuilt before this last time?
73 Eldo convert w/FiTech EFI, over 30 years of ownership and counting
Somewhat recently deceased daily drivers, 80 Eldo Diesel & 90 CDV
And other assorted stuff I keep buying for some reason

Christopher Petti

#23
April 26, 2016, 11:55:34 PM
Sten,
  No previous rebuild. The Cadillac had 80k miles on it when I bought it. I asked about it from the people I purchased it from. They tracked the car to the first owner in Kentucky.  No records of transmission work by previous owners. So the seals on my Cadillac made it 60 years.

Chris
And uses too much gas
Some folks say it's too old
And that it goes too fast
But my love is bigger than a Honda
It's bigger than a Subaru
Hey man there's only one thing
And one car that will do
Anyway we don't have to drive it
Honey we can park it out in back
And have a party in your pink Cadillac

Stenv-dk

#24
April 27, 2016, 01:41:50 AM
Chris.

Thanks for feed-back.  ;)

My transmission has leaked in Winter. So the first drive in april was with under minimun of oil. I didn't check until after I went for the first drive. I added 2 liters. So I guess I have the same trouble as yours. But I'll try some other things first.

Sten

Roger Zimmermann

#25
April 27, 2016, 02:12:57 AM
Sten, you have first to find where the transmission is leaking. Most of the time if the transmission is leaking while not used for a long time, the gasket at the bottom of the transmission may leak or, mostly, the leak is at the tube for the dipstick. To sela the tube, there is an O ring into the case which with the time is getting hard (like the other rubber seals) or the tube is not perfectly cylindrical.
If the transmission was never overhauled (but I doubt it), it's time to do it!
I would like to do the work for you, but we are a little bit too far away...
1956 Sedan de Ville (sold)
1956 Eldorado Biarritz
1957 Eldorado Brougham (sold)
1972 Coupe de Ville
2011 DTS
CLCMRC benefactor #101

Stenv-dk

#26
April 27, 2016, 06:27:14 AM
Okay  :)
Things don't last forever, you mean?  :-\

I have the "Big book" about Cadillac and I'm educated car mechanic (or what it's called?) BUT I have NEVER repaired a hydromatic transmission!!!

Great forum you got here  ;) and thanks for the answers until now

Sten
Denmark

Stenv-dk

#27
April 27, 2016, 12:50:55 PM
Problem sulved  ;D ;D
I adjusted the cabel from transmission to cab. About 5 cm the other way. I changed the carburator last year, and I have never got it to change gear very smooty, and this spring it was very very bad.
But now it's working.
But I found the leak, and I'll buy at new "rubberring" (I don't know the english word)

Stenv-dk

#28
April 27, 2016, 12:56:31 PM Last Edit: April 27, 2016, 01:26:53 PM by Stenv-dk
Cab

J. Gomez

#29
April 27, 2016, 01:11:08 PM
Quote from: Stenv-dk on April 27, 2016, 12:50:55 PM
Problem sulved  ;D ;D
I adjusted the cabel from transmission to cab. About 5 cm the other way. I changed the carburator last year, and I have never got it to change gear very smooty, and this spring it was very very bad.
But now it's working.
But I found the leak, and I'll buy at new "rubberring" (I don't know the english word)

Sten,

It is the Extension Tail Housing Rear Seal

Good luck..!
J. Gomez
CLC #23082

J. Gomez

#30
April 27, 2016, 01:23:10 PM
Quote from: Stenv-dk on April 27, 2016, 12:56:31 PM
Cab

That is the TV rod from the transmission throttle lever.

If you have the 1956 Service manual follow the steps in section 12 under page 12-57 and 12-58 for the adjustment.

Since this rod also connects to the throttle relay you would need to re-check the adjustments of the throttle relay valve under Section 10 page 2.

Good luck..!
J. Gomez
CLC #23082

Stenv-dk

#31
April 27, 2016, 03:41:33 PM
Thanks a lot.

My Cadillac is a 1957.
I have the Cadillac 1957 Shop Manual

Christopher Petti

#32
April 27, 2016, 04:40:16 PM
Sten,
  Glad you got it fixed! and it didn't cost you anything :) I had that same issue last year after popping off the carb to paint the engine. I took a picture so that I knew where to put the cable once I put it back together.. I had to play with it a little and take it for a few drives before it started shifting spot on. This is a great group of guys willing to help other Cadillac owners.
And uses too much gas
Some folks say it's too old
And that it goes too fast
But my love is bigger than a Honda
It's bigger than a Subaru
Hey man there's only one thing
And one car that will do
Anyway we don't have to drive it
Honey we can park it out in back
And have a party in your pink Cadillac

Stenv-dk

#33
April 28, 2016, 01:28:31 AM
Yes it's a great forum here.  :)

I found the adjustment advise in the book.
So one of these days, i'm gonna adjust the cab/transmission 100 %.

After that I have trouble with vaccumpumpe sitting same place as oilpump.
It sucks oil up to the manifold.
But that's an other story  ::)

Roger Zimmermann

#34
April 28, 2016, 01:48:42 AM
Quote from: Stenv-dk on April 28, 2016, 01:28:31 AM
After that I have trouble with vaccumpumpe sitting same place as oilpump.
It sucks oil up to the manifold.

The culprit is the small one-way valve which is outside of the engine block, behind the starter motor. Inside the valve, there is a small steel plate which should prevents that the intake vacuum sucks the oil from the engine. I had that problem once, I know how bad the engine is smocking!
Remove that valve (you will have to remove the starter motor to get it), open it and don't loose the small spring which is inside! Chance is that the steel plate is in a strange position, preventing it to do his job.
When I had that problem, I modified the brass fitting to be sure that the plate will no more be misplaced.
Don't ask for pictures, I don't have any.
1956 Sedan de Ville (sold)
1956 Eldorado Biarritz
1957 Eldorado Brougham (sold)
1972 Coupe de Ville
2011 DTS
CLCMRC benefactor #101

Stenv-dk

#35
May 04, 2016, 05:13:42 PM Last Edit: May 04, 2016, 05:18:52 PM by Stenv-dk
Today I adjusted the transmission.
Now it shifts smoothly  8)

Skwerly62

#36
May 04, 2016, 05:37:26 PM
Not t hijack your thread guys but what fluid is recommended for the Dual-Coupling Hydramatic's? My rebuilder said he couldn't find an exact answer and it looked more like motor oil when drained.
ATF 3 work ok or something better for my 58 trans? Thanks!
1958 Extended Deck 62 Sedan SOLD
1960 Coupe - current project
USCG Vet - Fly CG!

J. Gomez

#37
May 04, 2016, 06:43:06 PM Last Edit: May 04, 2016, 06:46:59 PM by J. Gomez
Quote from: Skwerly62 on May 04, 2016, 05:37:26 PM
Not t hijack your thread guys but what fluid is recommended for the Dual-Coupling Hydramatic's? My rebuilder said he couldn't find an exact answer and it looked more like motor oil when drained.
ATF 3 work ok or something better for my 58 trans? Thanks!

If you are flushing the old tranny fluid GM Dexron VI or III if you can find it should do it. The original type was Type A which you can still find mostly hydraulic type places or special oil web sites.

Although the attached document states the new Dexron is compatible with Type A it does not specify mixing old with new.  ;)
J. Gomez
CLC #23082
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