I sold my Lighting in ’09, so I may be mis-remembering but I think I remember some chatter about the knock sensors in the ... rather loud... supercharged 5.4. It was a bit ambiguous to detect because there fairly pronounced piston slap in those motors. It also cut spark (or was it fuel?) for the 1-2 upshift, so it kind of sounded like flatulence. It was tough to make an issue of that because that motor / exhaust sounded sweet.
I do know that I’ve been keeping an eye out for similar symptoms, I’ve mentioned before I’ve seen the Raptor jump high in the gear range, having the engine loafing as low as 1100 rpms. I’ve had it try to “boost” through acceleration requests - the trans stubbornly holding a gear as I add throttle, but no hint of shuddering ( like my turbo outback did ). So that’s why I’m suggesting the knock sensor.
Good luck.
