Not sure why we would use hi friction clutches, eliminate things that soften the shift and make everything apply quicker, add clutches to increase surface area, turn up the pressure, do everything more aggressively, and then put slippery trans fluid in it that is designed to make it shift smooth and soft, so grandma doesn't complain about feeling the gear change.

I went from Type FA to a premium synthetic ATF made for late model passenger cars in my two speed. A unit that would go plenty of runs and have the clutches look and mic like brand new . The result was black streaks on high gear clutches and steels from slippage on apply.

The only time there is line pressure on both sides of the piston is on the upshift, on initial application of the clutch there is only pressure on the case side which also supplies the clutch.



When cold, the line pressure is high even in an unmodified trans and the spring eases the shock of application. Removing the outer spring, by itself, serves no useful purpose.