Trans Leak

[restinose]

I have a leak on my transmission(M50D/5spd) I thought it was the shift rail plugs,but it turned out to be leaking at the shifter itself. This trans has been out for new clutch(previous owner). It appears whoever did the job was very lacking in skill. The seal??? that is part of the "dustcover" for the shifter is torn and there is a small rubber cup seal? just sitting on top not doing much of anything. Also there is a plastic ring,beveled on bottomside,with a wave washer and another similar washer snapped on that retains them both. What the heck are all these small pieces called? so I know what to order? How,in what order are they installed(something about that "cup washer" just doesn't look right) Also, when I removed the "plastic ring" it appeared to be bent or deformed or is that how it's supposed to look? I can't seem to find an exploded veiw of this tranny anywhere????? These Haynes manuals these days are realy annoying," this procedure may be beyond the scope of the do-it-yourselfer", just show me how it's done and I'll be the judge of what's beyond the scope of my abilities, JEEZ??!!! Oh yeah the truck is a 94 ranger 4X4/4.0