Hello all , I'm in the middle of doing my sm\420 conversion but I cant seem to get the overdrive back on. Is there a special way or tool or something to get it back on? I already put the main gear up and torqued to specs , put the lock washer in , put the lock washer retainer ring in . But now I can not get the over drive to go back on. Any help or instuctions on how to get it back on from here would be greatly appreciated. Just wanted to say thanks to all for the help . I finally got it with alot of assembly lube and a 2lb mallet. I guess during this whole evalution I just never got it straight and wacked it right all at the same time. Again thanks to all for the info and experience. Now I'm on to getting all the shifters and plates back in.