NooBE here, dumb question

[RedNeckMicky]

Hi All,
I was wondering if the 2002 f150 4x4's frame is closed or Open like C shaped? We have rust here in Pa.
Thanks

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[Fox146]

It is boxed (closed) but there are enough holes that you can spray some anti corrosion into. I used WoolWax as it comes with a 360 spray tip. Don’t think I’ll need to do inside the rails again

I see your asking about a 2002? Been a while but I’m sure they are boxed frames as well. One peek underneath should give you the answer