I don't think it is necessary
I've had my tranny out a few times and changed the oil every time and have never used a sealant on the threads and they never leaked.
they are a pipe thread so they seal well.
I suppose you could use a sealant anyways if it makes you feel better.
I have no idea what they do from the factory
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'88 lx, Black on Black, check it out here
Spent all my money on school, what a dumb mistake
I'm old enough to know better, but still too young to care.
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