Cadillac & LaSalle Club Discussion Forum

Cadillac & LaSalle Club Forums => Technical / Authenticity => Topic started by: las39 on January 05, 2014, 05:24:03 PM

Title: Manual Transmission Countershaft Oil Seal
Post by: las39 on January 05, 2014, 05:24:03 PM
Does anyone know where  to get these outdated oil seals that are used at the end of both the idle and countershaft?  Or at least know the correct name?
Attached picture from workshop manual, with red arrow.
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: Steve Passmore on January 05, 2014, 05:53:33 PM
Thats just a simple 'O' ring, Try a NAPA store. I bought a box of assorted sizes years ago, 100s in there.
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: las39 on January 05, 2014, 07:11:34 PM
Well mine is not an O ring. The grove is flat and about 5mm wide. It looks like a sliced bicycle tube but thicker.
Master Part list 1421118 # 20.0949 calls it Oil Seal.
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: joeceretti on January 05, 2014, 07:57:22 PM
I can't help but wonder if stacking a few o-rings together would work.
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: harry s on January 05, 2014, 08:28:08 PM
I think those seals were originally leather. I remember using a piece of leather cut to size and soaked in oil on my '37. It worked.    Harry
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: joeceretti on January 05, 2014, 08:45:57 PM
Quote from: harry s on January 05, 2014, 08:28:08 PM
I think those seals were originally leather. I remember using a piece of leather cut to size and soaked in oil on my '37. It worked.    Harry

Probably more durable than rubber.
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: las39 on January 06, 2014, 02:29:42 PM
Joe I thought about it too but don't think it will work. O ring grooves are genrally round and it will not seal enough.

Thanks for the tip Harry.
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: Brad Ipsen CLC #737 on January 06, 2014, 10:02:33 PM
For sealing the counter shaft and reverse idler shaft use cork gasket material cut to fit the square groove and your favorite sealant.
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: las39 on January 07, 2014, 05:44:36 PM
Quote from: Brad Ipsen CLC #737 on January 06, 2014, 10:02:33 PM
For sealing the counter shaft and reverse idler shaft use cork gasket material cut to fit the square groove and your favorite sealant.

Yes cork is also a widely used sealing method. I think I'll go for that.
Thanks all ;)
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: Tom Beaver on January 07, 2014, 11:21:52 PM
Northwest Transmission Parts (http://nwtparts.com/) who sells parts for the transmission supply o-rings for sealing the shafts.  They seem to work, but you need to use a de-burring tool or something to chamfer the outside edge of the hole in the case or it will shear the o-ring rather than compress it when you install the shaft.

Tom Beaver
Title: Re: Manual Transmission Countershaft Oil Seal
Post by: las39 on January 08, 2014, 04:28:12 AM
Thanks for the link. Appreciate all the answers ;)