Hromy

i just bought it on ebay.i was promised it drove&shifted well. it does not.reverse works as it should.all forward gears do too but will not shift out of L.when in L or S & u let off acc.ped al it drags down to a stop like a downshift to L does.when in D & let off acc.pedal it doesnt,it like free rolls like in N. i guess its trying to shift.i know about the T.V.linkage,must be exact to shift@correct speed,but it will not shift at all at any speed,so ive dropped pan&noww b4 i install new filter& fluid,what can&should i check or do?i heard about sticky valve in C.V.A.&Governor but have never touched any b4&heard C.V.A. is nothing for me(especially on my back)to mess with but can i at least clean&spray it with like WD & move the parts back&fort w/o removing?does pan have to be off to get to governor?i know ujoint,yoke&ext.housing must be removed,but does the pan?if it does not i was planning on installing new filter,pan&fluid & test for shift,but if pan needs to be off then i guess ill check the Governor while its off.alsoshould i flush trans too? this is how i was told:install new filter,pan&fluid to correct mark.disconnect return line from rad.& connect a hose to fittng &other end into clear jug.start car&run until fluid is new or clean(about 30sec.).shut off car&reconnect&refill.true?please if anyone can help,reply asap.i am very,very anxious.thanx,Don