What I see as the key issues here:
- He wants a reverse gear
- He wants gears 2, 3, 4, and 5 synchronized
I'm absolutely not sure whether the shafts and gears from a 7341 really fit into the gearbox of a
Zetor 7745. I had a similar question (converting a Zetor 7340 to synchronized gears 2, 3, 4, and 5 instead of just 4 and 5), but I haven't been able to definitively answer it for myself yet.
I find the question interesting, but I can't really contribute anything to it yet. I would need someone who has a 7341 gearbox open to measure various dimensions. I currently only have a Zetor 5211 gearbox open where I could measure.
It's also worth noting that the Zetor 7341 has a side shift, while the 7745 still has a center shift. You'd have to adjust the shift rods or the gearbox cover...
I also think it would be easier to find a 7341 gearbox and then install it in the 7745.
But as I said, I'm not sure about any of this and will be reading along with interest.