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Cadillac & LaSalle Club Discussion Forum

Cadillac & LaSalle Club Forums => Technical / Authenticity => Topic started by: David Greenburg on November 02, 2017, 03:37:32 PM

Title: ‘61 Hydramatic speedo drive seal
Post by: David Greenburg on November 02, 2017, 03:37:32 PM
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.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: The Tassie Devil(le) on November 02, 2017, 05:39:19 PM
Is't it a simple "O" Ring?

Bruce. >:D
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: David Greenburg on November 02, 2017, 05:45:18 PM
Apparently not.
Title: ‘61 Hydramatic speedo drive seal
Post by: bcroe on November 03, 2017, 03:06:14 PM
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
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: Eric DeVirgilis CLC# 8621 on November 03, 2017, 03:13:25 PM
Found this...

https://www.summitracing.com/parts/opg-km01199/applications/make/cadillac
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: Thor on November 03, 2017, 07:09:23 PM
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
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: P. Manoogian on November 03, 2017, 07:58:45 PM
Get a 5/16" 0 ring at NAPA. I did and it solved the leak.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: David Greenburg on November 03, 2017, 08:32:27 PM
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.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: russ austin on November 04, 2017, 10:54:06 AM
It is an O ring. The housing is metal and the speedo shaft is metal. The seal wears out and is a simple replacement.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: Petrolbowser on November 06, 2017, 02:48:46 AM
It's just an o ring. I did one last year cost a few cents and took about half an hour.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: David Greenburg on November 06, 2017, 01:18:58 PM
Good to know. Always nice to have a repair simpler than anticipated.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: Roger Zimmermann on November 11, 2017, 08:49:01 AM
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.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: russ austin on November 11, 2017, 09:40:14 AM
46-64 hydro matics gear sleeves are the same. The O ring is internal, and hard to see due to being worn down.
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: Roger Zimmermann on November 11, 2017, 10:16:22 AM
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?
Title: Re: ‘61 Hydramatic speedo drive seal
Post by: P. Manoogian on November 11, 2017, 01:19:40 PM
I believe it is 5/16". The 3/8" one balls up inside...it will work for a bit...but then it will leak.
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