Land Rover Repair: 1971 transmission, output shaft, series iia

Question
Yesterday, while going up thru the gears, the tranny just gave up. It won't fully go into any gear. It will slightly engage fourth otherwise nothing. It has a farley overdrive also. Is there a downloadable exploded view and/or guidance available? This is my first Rover (1971 Series IIA, 88 original cond)and I'd like to fix it asap. Thank you.
Tom


Answer
It sounds to me like the first motion shaft is gone or the lay gear is broken.  It probably only works in 4th because 4th directly connects the clutch to the output shaft (main shaft), thus, eliminating all the other gears in the transmission.  

I am not sure of where you can find an exploded view.