Re: 7.3 auto sometimes leaking, acting funny..questions..?
The problem is the torque converter hub seal is getting too hot. When it's hot it gets soft and can't hold. Once it cools off it will work again.
Check all your coolers, air/water/trans for stuff blocking the airflow, like leaves/bugs/small animals. If there isn't enough airflow it will get hot.
Another thing to consider is if you have a transmission cooler in the radiator. The first half of 2000 did not have one. That would have a BIG effect on the torque converter temperature. So would changing the air to oil trans cooler for one from a 6.0L truck.
Former Ford Automatic Transmission Engineer
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