Disclaimer....do this at your own risk. I have no way to know if all Focus seats are like this stock '06. All photos in this thread are around 100k ea.
Last summer I promised this would be my first big mod of the new year.....here it is, just starting today. And I have no way to know ahead of time how successful this will be, since most of the internals of this hinge are hidden from sight. Also...I don't think you can just buy the hinge from Ford (I think you may have to buy a complete seat if the worst happens).
I'm going to do this with the seat in the car (passenger seat only). Start by removing the handle...one screw, and it pulls off. Then remove the trim....start at the rear and pull back slightly. This loosens two plastic hooks. Then the whole piece pulls outward slightly, and pushes forward to remove. Easy. Put the handle back on...
Next work the recline a few times, and watch the mechanism. You'll see a flat "J" piece of metal going up/down. And you'll see the stopper pin...visible in the photos. As far as I can see...this is it. There's nothing on the inside hinge of the seat.
My idea is to drill out the stopper pin......allowing the seat-back to recline as much as possible. There is a toothed lever attached to the handle. This engages the "J" lever and locks the seat-back. And this is the part I'm not sure of. There's no way to see how many teeth are on the "J" piece. If the teeth go down a few inches (as I suspect)....this mod should work nice. If the toothed section of the "J" piece pivots further than the lever piece can catch......the seat will recline way back, but there will be nothing to hold it in that reclined position.
If that happens, I suppose I could rig up a catch strap of some sort. The idea here is for the seat-back to recline almost level (maybe removing the head-rest). This would be strictly for carrying long cargo. I'm uncertain how strong the setup would be for a flat sleeping surface.
Anyway......I doubt anybody has tried this mod. If anybody has looked into this, please let me know.
Before I go any further, I'll wait for some feed-back here.
Edit.....the mod works. And apparently it also works on a 2000 model. Read through the thread......