hi all new here,just bought my 135,1964,multi power, diesel,had it about 2 months, first thing I noticed is clutchs were slipping,planned on replacing this winter while I didn't need it, last week tractor quit moving,multi power shifter wouldn't shift into low,although tractor wouldn't move anywhere,took top trans cover off,3 point cover off, broken carter key on splined shaft,anyway split tractor to replace clutches,bout 2-3 quarts oil in bell housing, didn't realize it was leaking while it was running,now do I replace trans seals and rear main,and pan gaskets all three or what, just don't know what next plan of attack is going to be