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‘61 Hydramatic speedo drive seal

Started by David Greenburg, November 02, 2017, 03:37:32 PM

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David Greenburg

My ‘61 has a pretty good leak from the speedo drive.  Does anyone know a source for a new seal? A trusted trans. guy has not been able to locate one.
David Greenburg
'60 Eldorado Seville
'61 Fleetwood Sixty Special

The Tassie Devil(le)

'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

David Greenburg

David Greenburg
'60 Eldorado Seville
'61 Fleetwood Sixty Special

bcroe

On many trans, the speedo gear & shaft are plastic, and the area of
seal contact wears down so the seal is no longer effective.  Bruce Roe

Eric DeVirgilis CLC# 8621

A Cadillac Motorcar is a Possession for which there is no Acceptable Substitute

Thor

Quote from: Eric DeVirgilis CLC# 8621 on November 03, 2017, 03:13:25 PM
Found this...

https://www.summitracing.com/parts/opg-km01199/applications/make/cadillac

I bought that part to seal the cable-through-firewall hole....... not even close.  The cable passes through the firewall at quite an angle.  The correct seal was found from our friends in Scandanavia!

As for the Speedo cable seal leak - I have that problem too, will be interested to see what surfaces.

Randy Bergum
1960 Eureka Hearse
#26162

P. Manoogian

Get a 5/16" 0 ring at NAPA. I did and it solved the leak.
1961 Eldorado - Shell Pearl/Mauve
1962 Corvette 327 - 250 HP Automatic Triple Black
1963 Impala SS Convertible - 283 Automatic Black Red Gut White Top
1965 Impala SS Coupe  - 502 Turbo 400 - Crocus Yellow
1974 Corvette L84 4spd Coupe - White / Black Leather

David Greenburg

The Summit part looks like a firewall grimmest, and not the trans seal.  I’ll try an O ring and see if that helps, although if it were that easy I think the trans guy would have nailed it. He’s pretty familiar with old GM slushboxes.
David Greenburg
'60 Eldorado Seville
'61 Fleetwood Sixty Special

russ austin

It is an O ring. The housing is metal and the speedo shaft is metal. The seal wears out and is a simple replacement.
R.Austin

Petrolbowser

It's just an o ring. I did one last year cost a few cents and took about half an hour.

David Greenburg

Good to know. Always nice to have a repair simpler than anticipated.
David Greenburg
'60 Eldorado Seville
'61 Fleetwood Sixty Special

Roger Zimmermann

My 2 cars (1956 & 1957) are leaking at the spedometer cable; not a lot but it's annoying. I don't see where an o ring can be installed.
Most probably the housing for the later cars are different and allow for an o ring installation.
1956 Sedan de Ville (sold)
1956 Eldorado Biarritz
1957 Eldorado Brougham (sold)
1972 Coupe de Ville
2011 DTS
CLCMRC benefactor #101

russ austin

46-64 hydro matics gear sleeves are the same. The O ring is internal, and hard to see due to being worn down.
R.Austin

Roger Zimmermann

Therefore, I did not look good enough. I will have to look again on a spare part. Do you have the diameter of that o ring?
1956 Sedan de Ville (sold)
1956 Eldorado Biarritz
1957 Eldorado Brougham (sold)
1972 Coupe de Ville
2011 DTS
CLCMRC benefactor #101

P. Manoogian

I believe it is 5/16". The 3/8" one balls up inside...it will work for a bit...but then it will leak.
1961 Eldorado - Shell Pearl/Mauve
1962 Corvette 327 - 250 HP Automatic Triple Black
1963 Impala SS Convertible - 283 Automatic Black Red Gut White Top
1965 Impala SS Coupe  - 502 Turbo 400 - Crocus Yellow
1974 Corvette L84 4spd Coupe - White / Black Leather