Gearbox - mechanical with manual shifting, has five forward gears and one reverse gear, all forward gears are synchronized

Remove the transfer case and clean it of dirt

Drain the oil from the transfer case.

The design of the gearbox is discussed in the article - Design features of the rear gearbox VAZ-2123

We wash and clean the gearbox from dirt and oil.

Before disassembling, clean the outside of the box with a cleaner or solvent.