gearbox coming out again

i am removing gearbox(manual) again the first time the oil level went low and melted the bearings i changed the gearbox and one week later the roll pins on the fork snapped box out again that box ran unreal rough and when it got very bad i bought another box fitted it few weeks ago and it was difficult to get into gear i came out of a shop last week and had no gears gearstick falling about so tonight im taking the box out again (not funny)

gear stick falling about is probably just top selector housing bias mechanism falls to pieces swap with another and check selector yoke grub screw at same time just inside box

box out i will check it out tomorrow

back together again running sweet the pin from the top housing going into the box was loose and damaged

didnt have to take it out again then

i took it out to replace the pilot bearing as it was not good