Take the whole trailing arm off at the rubber mounting, knock the roll pin out of the gearbox output shafts, disconnect the brake hose and hand brake cable, and you can work on the whole unit.
It can take about 4 tonnes in a press if they are badly rusted in place.
Clean out around the needle roller cup in the yoke with a small pointed wire brush in a drill, and then soak the area with WD40.