i have checkd the seal  below the shoe augers and its good all corners are tight.  i installed a kit that john deere said would solve my problem it consits of  an angle piece for the pre cleaners and  a flap for the corners of the precleaner on the outside. also the fat plastic fingers to move crop back farther befor e droping it.  i made sure precleaner was shut tight .  problem is still their  john deere said they dont know what the problem is  if i figure it out let them know.  their engineers  dont know anything never had this problem they said.  i installed hardware cloth over the precleaner to make sure beans werent over loading pre cleaner pan.  i thought they were falling forward on the backstroke of the pre cleaner pan.  this helped a little but not  much.   any other help would be appreciated  thanx.