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using your internet search engine of choice, search for “Ford F series twin panel moonroof broke”
LMK if you get under 100,000 results.
see above.
THIS. There is so much surface contact area between glass and gasket that over time it collects debris, and begins to stick. The longer you go between opening it, the greater the resistance the glass & sticking gasket (the rubber seal) has. If you try to move the glass rearward in this condition, it will break the tracks 100% of the time.
Routine maintenance will prevent this from happening and a workaround of popping the glass open to the VENT position FIRST, to ‘break’ the seal, then moving it rearward will generally keep you out of trouble. Doing both regular Krytox grease application and popping to vent will keep you out of the weeds.
My major complaint with it is one of bitterness. I bought in early 2017 and the only MSRP deal I could land was an 802a with the moon roof. It was 2 grand I didn’t want to or need to spend - and it did break because I wasn’t aware just how often you need that glass / rubber re-greased.
Should be easy to find lead foot for much less money since you’ll have to paint it anyway ;-)