The device of the main gear drive pinion of the transfer case [Toyota Carina T190]

With mechanical interaxle differential locking system
1, 2 - bearing,
3 - shaft of the main transmission drive gear,
4 - main gear drive pinion.

With viscous coupling
1 - bearing,
2 - right cup of the main gear drive pinion,
3 - retaining ring,
4 - intermediate shaft of axle gears No.2,
5 - viscous coupling assembly,
6 - left cup of the main gear drive pinion,
7 - main gear drive pinion.