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Old 01-19-2014, 07:16 PM   #1
cwilkie
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Join Date: Sep 2001
Location: Belcourt ,ND, USA
Posts: 750
TH400 gasket seal.

Hi guys. What is the proper way to seal a TH400 pan gasket? I have tried various things this past year and it still leaks. I torqued it to specs, tried different types of gaskets, a new pan, and nothing seems to work.

I heard from a friend I need to take the pan off. Wait for the fluid to drain. Put a new cork gasket on. Torque it to specs then wait a day for it to seal then add the fluid. I am confused.
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1968 Chevrolet Stepside
BB 396 w/TH400

1972 Chevrolet 3/4 Ton 4x4
BB 496 w/TH400
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