Drain all the oil from the transmission and replace it with diesel or kerosene to the correct level, then try again, clutch and brakes run in oil on the 2 Ton and makes them really hard to steer initially, once you get them free run a light straight weight oil in the transmission. When you get under the transmission to drain the oil you will notice there are actually about 5 drain plugs, open them all up, it allows you to drain each compartment better, remember not to drive the tractor too far with the kero or diesel once you have everything free and turning.
regards
Mike
Mike is right on the oil. If somebody put gear oil or any heavy weight oil in the trani you never will get it to turn correctly. The trani oil should be the same weight oil as used in the engine.
Ken