At highway speed (windows open) the first bow from the front window sags, drawing the second bow down slightly. Is there an easy fix? Will headliner need to be pulled out? Is there a positive attachment that may have come loose? This is not the "center" bow near the dome light, but one stitched seem back from windshield.
This is on a 57 four door sport sedan. Ambient heat or cross wind may have surpassed the cabin pressure threshold that caused the problem today for the first time. It is a nuisance issue. The area over the driver and passenger remains in place, for now. I've owned and driven it about 500 miles, and an unknown builder may have removed headliner to repair roof dent, but it appears to be older or original headliner.
This is on a 57 four door sport sedan. Ambient heat or cross wind may have surpassed the cabin pressure threshold that caused the problem today for the first time. It is a nuisance issue. The area over the driver and passenger remains in place, for now. I've owned and driven it about 500 miles, and an unknown builder may have removed headliner to repair roof dent, but it appears to be older or original headliner.