3 to 1 ratio hmmm? What a pain. I think I am going to wish that I had another TH350C core as the one I have has the intermediate clutch wave washer in about 4 pieces. This (of course) caused the intermediate clutch piston to cock sideways and break, and the wave washer pieces then proceded to gouge the case a tad bit. I do have another piston and wave washer but need to decide if I want to use this case......POOH!