Author Topic: Manual Transmission Countershaft Oil Seal  (Read 386 times)

Offline las39

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Manual Transmission Countershaft Oil Seal
« on: January 05, 2014, 04:24:03 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Does anyone know where  to get these outdated oil seals that are used at the end of both the idle and countershaft?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.
« Last Edit: January 05, 2014, 04:27:17 PM by las39 »
1939 LaSalle 5027
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Offline S Passmore

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Re: Manual Transmission Countershaft Oil Seal
« Reply #1 on: January 05, 2014, 04:53:33 PM »
Thats just a simple 'O' ring, Try a NAPA store. I bought a box of assorted sizes years ago, 100s in there.
Steve Passmore

Offline las39

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Re: Manual Transmission Countershaft Oil Seal
« Reply #2 on: January 05, 2014, 06:11:34 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.
« Last Edit: January 05, 2014, 06:20:58 PM by las39 »
1939 LaSalle 5027
1941 Chrysler Royal Coupe
1934 Oldsmobile F36
1992 Mercedes 300 TE 4MATIC
1954 BSA M33
1976 Moto Guzzi Convert

Offline Joe Ceretti

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Re: Manual Transmission Countershaft Oil Seal
« Reply #3 on: January 05, 2014, 06:57:22 PM »
I can't help but wonder if stacking a few o-rings together would work.
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Offline harry s

  • Harry Scott 4195
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Re: Manual Transmission Countershaft Oil Seal
« Reply #4 on: January 05, 2014, 07:28:08 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
Harry Scott 4195
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Offline Joe Ceretti

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Re: Manual Transmission Countershaft Oil Seal
« Reply #5 on: January 05, 2014, 07:45:57 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.
Joe Ceretti - CLC#28183
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Offline las39

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Re: Manual Transmission Countershaft Oil Seal
« Reply #6 on: January 06, 2014, 01:29:42 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.
« Last Edit: January 06, 2014, 04:36:24 PM by las39 »
1939 LaSalle 5027
1941 Chrysler Royal Coupe
1934 Oldsmobile F36
1992 Mercedes 300 TE 4MATIC
1954 BSA M33
1976 Moto Guzzi Convert

Offline Brad Ipsen CLC #737

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Re: Manual Transmission Countershaft Oil Seal
« Reply #7 on: January 06, 2014, 09:02:33 PM »
For sealing the counter shaft and reverse idler shaft use cork gasket material cut to fit the square groove and your favorite sealant.
Brad Ipsen
1940 Cadillac 60S
1938 Cadillac 9039
1940 Cadillac 40-6267
1940 LaSalle 40-5227

Offline las39

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Re: Manual Transmission Countershaft Oil Seal
« Reply #8 on: January 07, 2014, 04:44:36 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 ;)
1939 LaSalle 5027
1941 Chrysler Royal Coupe
1934 Oldsmobile F36
1992 Mercedes 300 TE 4MATIC
1954 BSA M33
1976 Moto Guzzi Convert

Online Tom Beaver

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Re: Manual Transmission Countershaft Oil Seal
« Reply #9 on: January 07, 2014, 10:21:52 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

Offline las39

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Re: Manual Transmission Countershaft Oil Seal
« Reply #10 on: January 08, 2014, 03:28:12 AM »
Thanks for the link. Appreciate all the answers ;)
1939 LaSalle 5027
1941 Chrysler Royal Coupe
1934 Oldsmobile F36
1992 Mercedes 300 TE 4MATIC
1954 BSA M33
1976 Moto Guzzi Convert

 



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