I guess I should have mentioned in the original email that you will see asmall wet spot on the ground under the car and from taste, it's antifreeze. So there is an external leak and I'd guess it's on the firewall somewhere, but I've yet to try to pin it down. I guess more detective work is in order.
The drains in the heater box will ensure that an internal leak will also end up on the ground. They drain over the top of the tranny. -- Jim