Yes its a common problem. Expensive because of labour cost involved. Better let the guys from the east have them, they have lower labour cost.i had a zts 8245&9245 both had trouble with their gearboxs slipping out of second &then third gear until i changed the box,i also saw another 12245 with the same trouble for sale &a 9211 that had a box out of 8111.fitted for sale.
I think thats the whole problem: the UR2 synchro needs a second to do its job. Many drivers are impatient and yank the lever as if it was an old Ford 8210... Then the syncrhos start to play up.Some drivers are complaining about syncros, but if you can drive old truck you can manage with these tractors.