There's a couple of moving parts to this. Aside from dealing with the bank (which is a process unto itself), there will be two particular issues for you: (1) transfer duty (stamp duty) and (2) Titles Office fees.
Re transfer duty: There is an exemption from transfer duty available to transfers of property between ex-spouses as long as the requirements are met. The requirements are that you must have either a court order or a financial agreement under the Family Law Act (specifically made under sections 90, 90L, or 90WA of the Act)
. A copy of the orders/agreement must be lodged to obtain the exemption.
Otherwise, transfer duty will be assessed on the value of the property. Since you are considered related parties you'll need to get an appraisal/valuation, and duty will have to be paid on the highest value attributed to the property under that appraisal/valuation for the share being transferred (e.g. half share). For example, if the appraisal says the value is between $330,000 and $360,000 - you calculate transfer duty on $360,000 and then multiply it by the share in the property actually being transferred.
If it is your principal place of residence, you'll get a further reduction on the duty payable.
You can find a calculator here:
http://amun.osr.qld.gov.au/sap/osrqld/wd_tfr_calc_com#
Re Titles Office fees: There's no exemption for Titles Office lodgement fees. If the transfer is pursuant to orders (effectively zero consideration), the lodgement fee is $192.00. Otherwise, the fee is based on the consideration at the current rate of $192.00 for the first $180,000 of consideration, and a further $36.00 for each $10,000 or part thereof after the first $180,000.