My 87 T-Bird's interior was quiet as new when I bought it... but that all changed after a heater core replacement. The problem is it's getting worse. I didn't replace the heater core or remove the dash, but what can I do to reduce this noise? I don't need to hear creaking with every turn or bump.
Are you sure it's your dash? my doors creak and it's because I'm missing some plastic grommet. If it's your dash maybe you didn't screw everything back together firmly.