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.
With as much disinformation as there is regarding transmissions, maybe you should think about doing a "what parts to use" thread regarding the 727 and 904. I know I for one would appreciate it.
