Most 904s have a higher stall converter. What method did you use to install SIX frictions into the direct drum? Thinner top plate? Figuring the grooves take up 20% of the surface area, then four smooths equal five grooved.
Yes I used a thinner top plate and snap ring
The drum was already a 5 disc one
Plus I used different thickness steels
To get the clearance I wanted.
Went with a 3500 9.5" dynamic converter
