Remove the central bolt securing the differential output shaft.
Install the clutch housing on the support and remove the differential output shaft.
Press out the differential output shaft seal (see photo).
Press in a new seal using a mandrel, having first placed some consistent grease between the inner edges of the seal.
Tighten the output shaft mounting bolt to a torque of 2.0 kgf·m.
Put the wheel drive shaft in place and tighten the bolts securing the inner joint to the differential output shaft flange to a torque of 4.5 kgf·m.
Restore the oil level in the gearbox housing.