Hi Max,
Don't know if you can help me with the transmission on this H26. Today I was trying to sort out why it would not go into reverse. Reverse obviously had not been used in a very long time. Took me a while to get the selector freed up, so I guess that will start leaking oil once I change it. My problem with it now is once I adjusted the rods to allow it to go into high/low and reverse, they were so far out somebody did it on purpose or they had no idea what they were doing. Problem now is with it in neutral something is dragging in the transmission because it is so hard to push