th350 question

[d.c.]

Even very small nicks in the shaft seal can cause a fluid leak. Did you check both surfaces ie the seal ring and the tc shaft for any damage or debris that could be causing the leak? In addition the tranny seal will have a round spring on the back of it that keeps tension on the seal just like on an axle shaft seal. Did you check to make sure the spring is seated properly? make sure of this because a) it will cause a leak and b) it will eventually get pulled into the tranny internals and destroy everything.