Orange: input shaft Yellow: 4th syncro blocker ring Green: 3 -4 shift collar (in 3rd gear position, 3rd syncro ring hidden by shift collar) white: 3rd speed main gear Grey: 2nd speed main gear
Red: counter shaft Purple: 3 speed counter gear Pink: 2nd speed counter gear (all gears splined on counter shaft)
With both PTO covers off & 2 prybars try moving blue towards green. A helper on the top would be helpful.