HDX
Senior Member
Cory, Its just silicone that somebody put on when the door was last worked on some years ago. It is all gone now because I scraped it off. Originally the inner door panels were lined with a thin amount of sheet lead. This was on the last trucks built. It firmed up and added some weight to the doors. Once these door panels are put back on ,They hopefully wont come off again. Still trying to find Sheet lead but hard to source. That is why the inner panels are still off.