I have an identical freewheel (marked FH-68-P5) which I am struggling to remove. I note your post update you said that it just pulls off. I have removed both end caps and resorted to putting freehub body in a soft vice and applying what I would describe as a reasonable amount of force, but still no joy
Could you give me an idea of the method you used and also a feel for how much "brute force" you had to apply?
Any help appreciated
Yeah no worries asking about the freehub. I have since changed the freehub for a new one and whilst mine came off ok I think that was due to is missing an O-ring it has since transpired. When I went to get it changed at my local bike shop who I have been going to for over 20 years they were unable to order the new freehub. It turns out you can only order from a Bonty/Trek dealer which in the end I did...Not cheap mine the new one was £58 something and required a specific tool to press it back onto the hub ( another £10!). I am super happy with the new freehub though...and its been through one super muddy wet winter and is going through another just this weekend. I have probably done around 2000 miles on it so far and still nice and clicky and no slop/play when putting the power down.
So not knowing why you are removing it I can only say if its replacement take it to a trek dealer or if its to replace with another freehub then you could try 2 X thin bladed flat screw driver between the hub and the freehub on opposing sides.
Let me know if you have any other questions and how you get on.