Leaking issues in my 200 4R - any gurus available?

No dice. If the engine temp stays around 180 degrees which it does on cool days, it won't leak. If it's a hot day and the engine runs 200 or more, it leaks like a sieve. I had to pull over three times the other day on the way home. Art Carr is worse than useless. I am through with him. The thought between friends, local transmission guy and my research is that the torque converter is slipping causing high heat. I'm heading to a local guy who says he can drive it and tell me if the torque converter is locking up or slipping. I am looking at a couple different torque converters. Most of the performance shops ask my specs and are recommending a 3500 stall, and my current is 2800. It's going to be interesting.