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Old 01-08-2020, 08:32 AM   #1
37 Cab
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Default Clamshell.. Felt or cork

The clamshell seal provided by Mitchell for my 37 is cork. It had a felt seal in it. Which would you use? Should I try to find a replacement felt seal or is the cork seal ok?
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Old 01-08-2020, 08:45 AM   #2
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Default Re: Clamshell.. Felt or cork

Roy Nacewicz (now under a new name) listed the felt seals.

Web site is FordScript.com

Go to " Early V8 hardware" and on page 17, you'll find item D-002:
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Old 01-08-2020, 09:06 AM   #3
Ken/Alabama
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Default Re: Clamshell.. Felt or cork

I’ve always used the cork , never had an issue .
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Old 01-08-2020, 09:15 AM   #4
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Default Re: Clamshell.. Felt or cork

Thanks Ken. That is what I will do then. Do you position the ends at the top or the side?
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Old 01-08-2020, 09:36 AM   #5
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Default Re: Clamshell.. Felt or cork

I've always used the cork as well . . . can't say that I've ever seen a problem with them.
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Old 01-08-2020, 09:59 AM   #6
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Default Re: Clamshell.. Felt or cork

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I use the 0 ring seal in my stock 40 Ford clam shell. Much more durable than cork or felt.
https://www.ebay.com/itm/Ford-flathe...QAAMXQTghRXOy6
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Old 01-08-2020, 10:08 AM   #7
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Default Re: Clamshell.. Felt or cork

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Originally Posted by 19Fordy View Post
I use the 0 ring seal in my stock 40 Ford clam shell. Much more durable than cork or felt.
https://www.ebay.com/itm/Ford-flathe...QAAMXQTghRXOy6
That is a good idea - why the heck not!
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Old 01-08-2020, 10:24 AM   #8
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Default Re: Clamshell.. Felt or cork

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Originally Posted by 19Fordy View Post
I use the 0 ring seal in my stock 40 Ford clam shell. Much more durable than cork or felt.
https://www.ebay.com/itm/Ford-flathe...QAAMXQTghRXOy6
You can easily make one with the right diameter tubing.I used a small spring to join both ends together. Spring goes inside the tubing.
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Old 01-08-2020, 10:34 AM   #9
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Default Re: Clamshell.. Felt or cork

There's a little internal piece with the same ID as the seal that holds it together.
Don't forget to put the paper gasket seals in first.
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Old 01-08-2020, 11:15 AM   #10
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Default Re: Clamshell.. Felt or cork

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Originally Posted by 19Fordy View Post
There's a little internal piece with the same ID as the seal that holds it together.
Don't forget to put the paper gasket seals in first.
Paper gasket seals? On the flats, right?
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Old 01-08-2020, 12:53 PM   #11
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Default Re: Clamshell.. Felt or cork

Tim: Yes. On the flats surfaces of where the clam shells mate together. You will see the old gaskets when you take it apart. I say, "Don't forget" because if you do, you will have to either slide the drive shaft out of the universal joint or cut the paper gaskets at the top so you can install install them. I forgot and did the latter. Take photos for provenance.
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Old 01-08-2020, 01:08 PM   #12
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Default Re: Clamshell.. Felt or cork

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Originally Posted by 19Fordy View Post
Tim: Yes. On the flats surfaces of where the clam shells mate together. You will see the old gaskets when you take it apart. I say, "Don't forget" because if you do, you will have to either slide the drive shaft out of the universal joint or cut the paper gaskets at the top so you can install install them. I forgot and did the latter. Take photos for provenance.
Got it and good tip!
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Old 01-08-2020, 10:46 PM   #13
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Default Re: Clamshell.. Felt or cork

Also the speedo gear gasket and driveshaft seal [ installed properly ] adds up to being able to use a more liquid lube .

Your brake cross shat will be happier also .

I use felt and SAE 140 in all .

Your call on this bud .

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Paper gasket seals? On the flats, right?
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Old 01-08-2020, 11:05 PM   #14
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Default Re: Clamshell.. Felt or cork

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Originally Posted by 37 Cab View Post
Thanks Ken. That is what I will do then. Do you position the ends at the top or the side?
I always use the cork, and I position the ends at the top of the upper clam shell half. I also dry fit the cork with both pieces of the clam shells held together as they would be bolted in place. Sometimes it's been necessary to slightly trim one end of the cork for proper initial fit. This has always worked better for me than cutting the cork into two pieces.
I also always apply some grease to the cork before assembling clamshell halves to the back of transmission.
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Old 01-09-2020, 12:05 AM   #15
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Default Re: Clamshell.. Felt or cork

I use cork on 1935-up cars, but on a 32-34 with a one piece clamshell you almost HAVE to use felt.
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Old 01-09-2020, 03:37 AM   #16
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Default Re: Clamshell.. Felt or cork

I actually use steam packing in my clamshell. Works real good.
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Old 01-09-2020, 05:57 AM   #17
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Default Re: Clamshell.. Felt or cork

Quote:
Originally Posted by JM 35 Sedan View Post
I always use the cork, and I position the ends at the top of the upper clam shell half. I also dry fit the cork with both pieces of the clam shells held together as they would be bolted in place. Sometimes it's been necessary to slightly trim one end of the cork for proper initial fit. This has always worked better for me than cutting the cork into two pieces.
I also always apply some grease to the cork before assembling clamshell halves to the back of transmission.
Thanks John. That is exactly how I did it.
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Old 01-09-2020, 09:28 AM   #18
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Default Re: Clamshell.. Felt or cork

I use a gates hose that is for oil.
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