leak stop

Messages
348
Location
Mars
Has anybody ever used any type of "stop leak" that is supposed to stop a leaking transmission due to normal wear? I'm talking about this because my truck leaks transmission fluid, and I found a product that is supposed to be transmission fluid, and it also contains something that is supposed to stop any leak associated with it. Does this stuff add junk that could harm the tranmission? Or does it work with no suprises?
 
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