You MAY need to buy a workshop manual for the car cause the only manual on here is the evo 1-3 manual. There is a link on the evo forum pinned as workshop manual. When I hit the link it said i needed to register to another site and I'm still waiting on a reply. So I got mine from here in the meantime, it's not the same I assume cause the download is a little smaller as the one mentioned, but it has what i needed and possibly what you need?
carpdf.com/pdf/mitsubishi/nvxmsg/mitsubishilancerevolution1to3workshopmanuals.rar
there is a section about auto trans but I don't know if it will apply to what your after... someone else on here can help you further I'm sure, GL