1974 Duster
Car doesn't sit that much!
Took apart the caliper, found nothing wrong and clean inside. Polished the piston with 2000 grit wet/dry just to be safe and reassembled. Changed out both front hoses and flushed the system.
Dropped the trans pan and gave the pressure regulator one full turn. This raised the line pressure to 85/125 psi. So it looks like with the Trans-Go regulator spring in place one turn is good for 5 psi increase. The service manual states with the factory spring, one turn is good for 1-2/3 psi (9kPa) increase. Please verify with a pressure gauge if you are going to tinker around.
My notes here are for the next guy..