Remove thrust bearing (1) from flange (2) - observe condition and installation position, and replace if necessary. Remove flange from rear internal gear - remove retaining ring (3).
Install, Connect
Attach flange (5) to rear internal gear (6). Install retaining ring (4). Thrust bearing (7) to flange (5). Attach thrust washer (8) to thrust bearing (7).
Measure
Measure inner diameter of planetary carrier bushing: Dial Gauge MKM-571-B with probe for inner diameter, carry out several measurements, determine average. Measurement 30.0 to 30.026 mm, if necessary replace planetary carrier assembly. Measure clearance between planetary gears and housing using feeler gauge.
Measurement value:
For shorter gears: 0.20 to 0.60 mm.
For longer gears: 0.20 to 1.0 mm.
Measure inner diameter of the sun gear bushing. Same measurement as before.
Remove, Disconnect 
Install, Connect 
Measure 