I've been driving the car whenever the weather is decent and the new 3.23 gears seem to work just fine. No noise that I can hear. The car goes down the road nice but still has move than enough juice to spin the tires at will.

I screwed the prop valve all the way in (max rear brake force) and that helped with the brakes but it still isn't perfect. I think I'll need to swap in a MC with a smaller bore size to get the line pressure up to work with the four wheel disc brakes.