No, the 4712 still had, what was essentially a 3011 transmission. It did have oilpump drive with pto disengaged, but gearwheels and shaft sizes were the same. I dont know if the rear axle is the same as 4011 but 5511 has bigger crown wheel and pinion.
Transmissions of virtually any other UR1 will bolt to the 5511 rear end.