The only extensive write-up on the gearbox revision I've ever seen was here on this forum in this thread. The one you are looking for dates back to 2008 done my two people I know One of them was complaining about "freezing his a** off" Guess who? This was a TB/WP job with the engine out. This was 10 years ago due to some reasons on my side we're not able to do that anymore. Some years later my friend disassembled his gearbox after a track event but I didn't do much pictures of that event. I don't post technical photostories on prime anymore, I prefer this forum.
What's wrong with you gearbox?
2008 story: I guess that nsxprime has lost the story after a few major updates, hard to find now.