I have an update. Unfortunately my transmission completely died. It started slipping badly when it shifted, and the next day it completely died and the car had to be towed home. I am not sure if it just died because it has 243K miles on it, or if it died because of the manual TCC control. But either way, it's getting a "new" JDM SLXA transmission from a Honda Stream. There isn't much information available on the gear ratios of an SLXA transmission, but I remember reading that the final drive is a little higher because it is from a heavier vehicle. The US BMXA transmission has a final drive ratio of 4.067:1 and I found on Honda Japan's site that the SLXA Stream transmission has a final drive of 4.357:1 and slightly more aggressive gearing, so that's nice since performance is my main goal.
https://www.honda.co.jp/auto-archive...05/grade-data/