There should be a knob below the left side if the drivers position that engages/disengages the parking lock/hydro.
:ditto: Yeah, you have to push it slow, otherwise you will ruin the transmissionThat is the only way you can push a 1257. They can only be pushed slowly, otherwise you will damage the hydrostat. There is no other disconnect for it. Look at the medium frame service manual to see how it is assembled.