1-2-7-8 Clutch Releases

1-2-7-8 Reverse Control Solenoid 

The 1-2-7-8 reverse control solenoid is signaled off allowing S1 VFS SIG fluid to exhaust and the 1278R control valve to shift do to the 1278R control valve spring force. 1278R CLU fluid exhaust into the EX BACKFILL fluid circuit from the release of the 1-2-7-8R clutch assembly plates.