I just talked to my dealer and they said to fix the problem I need to buy the whole assembly. Light housing, gasket and drip pan (???). Over the phone they said it will fix it. But for how long??
"Wonder if there a TSB on this?"
Just found the TSB 04-20-5 Buy the "new" lamp assembly...
https://www.ford-trucks.com/tsb/full...hp?tsb=04-20-5