Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
Doesn't sound good, especially no reverse.
I would say you have a sprag clutch failure.
A Sprag is a one way clutch within an auto transmission.
A silent one way ratchet if you like.
Effectively it is a transmission rebuild to fix.
Seen many failures in Rodeo.
A transmission shop is your next option.
Generally about 3k drive in, drive out.
Hope you can get it repaired economically.