Looking for a leak in the reverse circuit I come across another HUGE leak! It was coming from the 2-1 manual band servo. "PRND4" oil acting on the release side of the servo was getting past the servo"s teflon seal and coming back to the exhaust port in the bottom of the manual valve bore. While this wasn't responsible, at least not by itself for the damage to the rear band it couldn't be helping things! Check out video 2 to see the difference after replacing the seal.