Well I was wondering if there is any negative effects of disconnecting the TCC on a 700r4 trans besides the gas mileage? I got my search working again and came across a post where russ merrit said this "Don't unplug it! The trans will over heat as the L/U actually allows the fluid to the cooler. With out L/U on a L/U unit it will fry itself." Is this true for ALL lock up transmissions or just the 200 4r's?