After lurking for awhile on these forums and learning a lot, it is time to contribute and hopefully help someone else out with my first post. Unfortunately, it’s an issue with the STI six-speed conversion. I do have an email out to FFR (Jay), so I’ll definitely post the followup. My donor is a 2004 STI (I am the original owner). The center differential looks very different than what is seen in the six-speed conversion guide. It doesn’t look the 2WD adapter will work with this drive flange. Doing research on the internet, it seems like the 2004-2005 STI DCCDs are different than the 2006-2007? That’s a guess from seeing different overhaul kits. For reference, the part number on this transmission is TY856WH3MA. Any subie experts out there have any thoughts? Anybody know the history of the DCCD changes?

2WD adapter and my drive flange (with oil pump drive gear):
wpid-wp-1422854092822.jpeg

Drive flange From the guide (with oil pump drive gear removed):
Screen Shot 2015-02-02 at 11.48.09 AM.gif

2WD adapter attached to the drive flange from the guide:
Screen Shot 2015-02-02 at 12.05.43 PM.gif

Pic of my disassembled DCCD with the 2WD adapter on the left, drive flange, clutch disks, center section:
wpid-wp-1422853974933.jpeg

Jeff