I have a 1980 atc 185 and I'm rebuilding the transmission and I'm having problems assembling the shift drum and the selector forks, the manual doesn't show a good picture or really describe well enough on how it all goes together. I know 2 of the selector forks fit on one shaft, and the middle fork fits on the other shaft but I don't know how to fit the bottom of the forks onto the shift drum. Can anybody explain how to do this or know somewhere where their is a diagram?