Originally Posted by passing
dont put stop leak in it. fix the leak.
+1 it will damage the tranny. If it is an automatic, might be the seal on the oil pan. If it is a stick, might be the main shaft seal. If it is coming from the bell housing of the tranny, it could also be a rear main seal. You will have to drop the tranny to get to the rear main seal. Hope that this help.
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