Check for play at the output shaft bearings and possible leaks at the seals.
The handbrake might also need attention.
You will have to remove the shock absorbers, undo the hub carriers from the half shafts, remove the half shafts and remove the swingarms as to be able to remove the rotors and access the calliper bolts.
This means that you will have to disassemble more or less everything but the diff.