5 friction/clutch clearance issue in a 904

67CUDA273 said

TrailBeast, which drum have you used in the past?

Click to expand...

Stock forward drum with four discs and a solid band, and 5 thin discs and steels in the direct drum by taking a little off the piston if need be, and cutting the outer edge of the outer pressure plate engough to get the retaining ring in and have the approximate right clearances.

Don't get me wrong, I am in NO way a race trans builder or a major pro at them or anything.
It was required learning on all major brands of standards and auto's where I worked, and then the little things you can do to make it work how you want came into it over the years.
Of course I probably dont remember 3/4 of it now, but then it isn't real relevent information to most anymore. (outdated by 30 years)