T 90 adapter bearing retainer gasket

This transmission is adapted for the Buick V6. It looks like the adapter fulfills the function of retaining the bearing and sealing the input shaft. I ask because the bearing retainer is installed in front of the adapter but with no gasket or seal. Is that correct?

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That adapter has a four bolt casting for the bearing retainer. The T-90 retainer is a 3 bolt. Have you had this installed with your V6?

 

Not yet. I'm doing it today.

 

Is there a seal in the transmission side of the adapter? If not, oil will fill the space between the adapter and the retainer. There is a sealed bearing available for the T-90, IIRC ... that would eliminate the need for any seal or gasket.

 

There appears to be.

 

You need to be sure.

Have you removed the adapter from the front of the transmission? If there is a seal in the adapter, then it will keep oil from coming down the shaft into the bearing retainer. Then the bearing retainer's only purpose is to support the throwout bearing - gaskets or seals there would do nothing. Also if the seal is in the adapter, there should be a gasket that seals the adapter to the transmission face, so that oil does not come out between the adapter and transmission.

 

On many adapters of that style the stock T-90 front retainer is used but sometimes must be cut off. Remove the adapter and check. That front bearing retainer (4 bolt) on the adapter is a Saginaw 3 and 4 speed front bearing retainer by the way.

 

If that's an Offy adapter, it used a seal and gasket on the transmission side.
The input seal was a Ford part number if I recall.

 

I got ID of adapter and OD of shaft. local napa found a seal pretty quick.

 

Thanks for the help! There was no seal or gasket. Good thing I looked...