Update:
Pump died due to flexplate breaking apart which allowed TC to have slop damaging a part they can't get in NZ and to bring in is $2000. Don't ask I don't know the part.
Good news sourced local transmission for $650 inc t. case so will have that as spare.
Bad news is will still cost $2500 to fit the replacement transmission inc their time to date to pull etc broken tranny. Could have been worse...?

