I have fully rebuilt this box, it's a DAM2886 which is very early A+, so bigger input shaft and drop gear shafts, but still an A gearset.
I have two issues, first is that when I run the input backwards to the normal direction of rotation, there is no neutral. If I run it normal driven direction I do get a neutral. Is that normal for a rebuilt box? To bind when run in a direction it won't see in normal conditions? It freaked me out because when I had assembled everything and was seating the mainshaft oil seal, I couldn't get the box in a neutral position.
Second and more importantly, when shifting into forth, if you pull the gear lever all the way back, it's pushing the syncro too far and it rubs on the laygear. If you push the gearstick back just a little (as though starting to change into third) then you can feel it settle into the proper location. In the video I am pulling back hard, as you would on a normal change into forth, then creeping it forward which you can see settles it about 4mm from its hard over position.
Should the syncro even be able to move that far? Is it free to move as far as it wants but the rodchange mechanism is expected to only push it far enough? Should I be tearing the gb down to check the syncro hub, or should this be resolved using the rodchange?